Document:

PROMISSORY
NOTE

 

	$________________	_______________,
    2017

 

FOR
VALUE RECEIVED, the undersigned, HOUSTON AMERICAN ENERGY CORP., a Delaware corporation (the “Borrower”), promises
to pay to the order of _________________________________ (the payee, its successors and assigns are hereinafter called the “Lender”),
at _________________________________________________________ or at such other place as may be designated in writing by the Lender,
the principal sum of $________________, together with interest thereon.

 

Unless
otherwise defined in this Note, all terms defined or referenced in that certain Bridge Loan Agreement of even date herewith (the
“Loan Agreement”), among the Borrower and the Lender, will have the same meanings in this Note as in the Loan Agreement.

 

This
Note is executed and delivered in connection with the Loan Agreement. All advances made or to be made under this Note will be
made subject to the terms and conditions stated in the Loan Agreement.

 

The
Borrower agrees that if, and as often as, this Note is placed in the hands of an attorney for collection or to defend or enforce
any of the Lender’s rights hereunder or under any instrument securing payment of this Note, the Borrower will pay the Lender’s
reasonable attorneys’ fees, all court costs and all other expenses incurred by the Lender in connection therewith.

 

This
Note is issued by the Borrower and accepted by the Lender pursuant to a lending transaction negotiated, consummated and to be
performed in Houston, Texas. Payment of this Note is subject to the terms and conditions of the Loan Agreement. This Note is to
be construed according to the internal laws of the State of Texas. All actions with respect to this Note, the Loan Agreement or
any other instrument securing payment of this Note may be instituted in the courts of the State of Texas sitting in Harris County,
Texas, or the United States District Court sitting in Houston, Texas, as the Lender may elect, and by execution and delivery of
this Note, the Borrower irrevocably and unconditionally submits to the jurisdiction (both subject matter and personal) of each
such court and irrevocably and unconditionally waives: (a) any objection the Borrower might now or hereafter have to the venue
in any such court; and (b) any claim that any action or proceeding brought in any such court has been brought in an inconvenient
forum.

 

The
makers, endorsers, sureties and all other persons who may become liable for all or any part of this obligation severally waive
presentment for payment, protest and notice of nonpayment. Said parties consent to any extension of time (whether one or more)
of payment hereof, release of all or any part of the security for the payment hereof or release of any party liable for the payment
of this obligation. Any such extension or release may be made without notice to any such party and without discharging such party’s
liability hereunder.

 

(SIGNATURE
PAGE TO FOLLOW)

 

    	Bridge Loan Note (2017)	Page 1 of 2	 

    	 

    

 

SIGNATURE
PAGE TO PROMISSORY NOTE

 

IN
WITNESS WHEREOF, the Borrower has executed this instrument effective the date first above written.

 

	 	HOUSTON
    AMERICAN ENERGY CORP.
	 	a
    Delaware corporation
	 	 	 
	 	By:
    	 
	 	Name:  	John
    P. Boylan
	 	Title:
    	President
	 	 	 
	 	(the
    “Borrower”)

 

    	Bridge Loan Note (2017)	Page 2 of 2NEITHER
THIS WARRANT REPRESENTED BY THIS CERTIFICATE NOR THE SHARES OF COMMON STOCK ISSUABLE UPON THE EXERCISE OF THIS WARRANT HAVE BEEN
REGISTERED OR QUALIFIED FOR SALE UNDER THE SECURITIES ACT OF 1933, AS AMENDED, OR ANY SECURITIES LAWS. NEITHER THIS WARRANT NOR
THE SHARES OF COMMON STOCK ISSUABLE UPON THE EXERCISE OF THIS WARRANT MAY BE SOLD OR TRANSFERRED IN THE ABSENCE OF SUCH REGISTRATION
OF THE SECURITIES UNDER SAID ACT AND ANY OTHER APPLICABLE SECURITIES LAWS, OR RECEIPT BY THE COMPANY OF AN OPINION OF COUNSEL
OR OTHER EVIDENCE ACCEPTABLE TO THE COMPANY THAT SUCH SALE OR TRANSFER OF SUCH SECURITIES IS EXEMPT FROM REGISTRATION UNDER THE
ACT AND ANY OTHER APPLICABLE SECURITIES LAWS.

 

WARRANT
to Purchase COMMON SHARES of

 

HOUSTON
AMERICAN ENERGY CORP.

 

	No.
    2017-BL-___	______________,
    2017

 

THIS
CERTIFIES that, for value received, ______________________________________ (together with its successors and assigns, the “Holder”)
is entitled, subject to the terms and conditions set forth below, to subscribe for and purchase ___________________________________________________________
(___________)1 fully paid and non-assessable Common Shares (as defined below) of Houston American Energy Corp., a
Delaware corporation (together with its successors and assigns, the “Company”), subject to adjustment in accordance
with Section 2.7, at a purchase price per Common Share equal to $0.50 per share (the “Exercise Price”).

 

This
warrant (this “Warrant”) is exercisable on or after the date hereof and expires at 5:00 p.m., Houston, Texas
time, on the Expiration Date (as defined below).

 

This
Warrant is one of a series of Warrants issued pursuant to Bridge Loan Agreements, dated on or about the date hereof, between the
Company and the initial Holders.

 

ARTICLE
I

Definitions

 

1.1 Definitions.
As used herein, the following terms shall have the meanings set forth below:

 

“Commission”
shall mean the U.S. Securities and Exchange Commission or any other United States Federal agency administering the Securities
Act and/or the Exchange Act at the time.

 

“Common
Shares” shall mean and include the shares of common stock of the Company, par value $0.001 per share, or any such other
securities (equity or debt) into which or for which such shares are converted, substituted or exchanged.

 

“Company”
shall have the meaning set forth in the introduction hereto.

 

“Convertible
Securities” shall mean debt instruments, units, interests or other securities which are convertible into or exercisable
or exchangeable for, with or without payment of additional consideration in cash or property into, Common Shares, either immediately
or upon a specified date or the happening of a specified event.

 

“Exchange
Act” shall mean the Securities Exchange Act of 1934, as amended, or any successor Federal statute, and the rules and
regulations of the Commission promulgated thereunder, all as the same shall be in effect from time to time.

 

“Exercise
Date” shall have the meaning set forth in Section 2.1.

 

“Exercise
Price” shall have the meaning set forth in the preamble hereto, as may be adjusted from time to time.

 

“Expiration
Date” shall mean the date that is one year from the date of issuance of this Warrant.

 

 

1 1
multiplied by the dollar amount of Bridge Loan Notes issued pursuant to the Bridge Loan Agreement.

 

    	HUSA
                                         –
                                         Warrant (2017 Bridge Loan)	 	 

    	 

    

 

“Holder”
shall have the meaning set forth in the preamble hereto.

 

“Registrable
Securities” shall mean (i) the Warrant Shares (whether or not the related Warrants have been exercised) and (ii) any
other securities issued or issuable with respect to the Warrants or Warrant Shares by way of stock dividends or stock split or
in connection with a combination of shares, recapitalization, merger, consolidation or other reorganization or otherwise. As to
any particular Registrable Securities, once issued such securities shall cease to be Registrable Securities when (A) they are
sold pursuant to an effective Registration Statement under the Securities Act, (B) they are sold pursuant to Rule 144 (or any
similar provision then in force under the Securities Act) and the transferee thereof does not receive “restricted securities”
as defined in Rule 144, (C) they have been sold in a private transaction in which the transferor’s rights under this Agreement
are not assigned to the transferee of the securities in accordance with Section 3.3 of this Warrant, or (D) they become eligible
for resale pursuant to Rule 144(d) (or any similar rule then in effect). No Registrable Securities may be registered under more
than one Registration Statement at any one time.

 

“Securities
Act” shall mean the United States Securities Act of 1933, as amended, or any successor United States Federal statute,
and the rules and regulations of the Commission promulgated thereunder, all as the same shall be in effect from time to time.

 

“Warrant”
shall have the meaning set forth in the introduction hereto.

 

“Warrant
Office” shall have the meaning set forth in Section 3.1.

 

“Warrant
Shares” shall mean the Common Shares into which this Warrant may be exercised.

 

1.2 Accounting
Terms and Determinations. Except as otherwise expressly provided herein, all accounting terms used herein shall be interpreted,
and all financial statements and certificates and reports as to financial matters required to be delivered to the Holder hereunder
shall be prepared, in accordance with accounting principles generally accepted in the United States (“GAAP”).
All calculations made for the purposes of determining compliance with the terms of this Warrant shall (except as otherwise expressly
provided herein) be made by application of GAAP.

 

1.3 Rules
of Construction. The title of and the section and paragraph headings in this Warrant are for convenience of reference only
and shall not govern or affect the interpretation of any of the terms or provisions of this Warrant. The use herein of the masculine,
feminine or neuter forms shall also denote the other forms, as in each case the context may require. Where specific language is
used to clarify by example a general statement contained herein, such specific language shall not be deemed to modify, limit or
restrict in any manner the construction of the general statement to which it relates. The language used in this Warrant has been
chosen by the parties to express their mutual intent, and no rule of strict construction shall be applied against any party. In
the case of this Warrant, (a) the meanings of defined terms are equally applicable to the singular and plural forms of the defined
terms; (b) Annex, Exhibit, Schedule and Section references are to this Warrant unless otherwise specified; (c) the term “including”
is not limiting and means “including but not limited to”; (d) in the computation of periods of time from a specified
date to a later specified date, the word “from” means “from and including” the words “to”
and “until” each mean “to but excluding,” and the word “through” means “to and including”;
(e) unless otherwise expressly provided in this Warrant, (i) references to agreements and other contractual instruments shall
be deemed to include all subsequent amendments and other modifications thereto, but only to the extent such amendments and other
modifications are not prohibited by the terms of the Warrant, and (ii) references to any statute or regulation shall be construed
as including all statutory and regulatory provisions amending, replacing, supplementing or interpreting such statute or regulation;
and (f) this Warrant may use several different limitations, tests or measurements to regulate the same or similar matters, all
of which are cumulative and each shall be performed in accordance with its terms.

 

    	HUSA – Warrant (2017 Bridge Loan)	2 	 

    	 

    

 

ARTICLE
II

Exercise of Warrants

 

2.1 Method
of Exercise.

 

(a) This
Warrant may be exercised in whole or in part by the Holder hereof at any time on or after the date hereof, and from time to time,
before 5:00 p.m., Houston, Texas time, on the Expiration Date. To exercise this Warrant, the Holder hereof shall deliver to the
Company, at the Warrant Office designated herein, (i) a written notice in the form of the Subscription Notice attached as Exhibit
A hereto, stating therein the election of such Holder to exercise this Warrant in the manner provided in the Subscription
Notice, (ii) payment in full of the Exercise Price as provided in Section 2.1(b), and (iii) this Warrant. This Warrant
shall be deemed to be exercised on the date of receipt by the Company of the Subscription Notice, accompanied by payment for the
Warrant Shares and surrender of this Warrant, and such date is referred to herein as the “Exercise Date.” If
the Holder exercises this Warrant as set forth herein, then the Company shall, as promptly as practicable and in any event within
5 business days after the Exercise Date, issue and deliver, or cause to be issued and delivered, to such Holder a certificate
or certificates for the full number of Warrant Shares set forth in the Subscription Agreement. As permitted by applicable law,
the Person in whose name the certificates for Common Shares are to be issued shall be deemed to have become a holder of record
of such Common Shares on the Exercise Date and shall be entitled to all of the benefits of such holder on the Exercise Date, including
the right to receive dividends and other distributions for which the record date falls on or after the Exercise Date and to exercise
voting rights.

 

(b) The
Holder shall pay the Exercise Price for all Warrant Shares purchased hereunder in full in cash or by certified check or wire transfer
of immediately available funds.

 

2.2 Warrant
Shares. The maximum number of Common Shares that Holder is entitled to purchase hereunder shall be _________ shares, as may
be adjusted, on the terms and conditions set forth herein.

 

2.3 Expenses
and Taxes. The Company shall pay all expenses and taxes (including all documentary, stamp, transfer or other transactional
taxes) attributable to the preparation, issuance or delivery of this Warrant and of the Common Shares issuable upon exercise of
this Warrant, other than income taxes.

 

2.4 Reservation
of Common Shares. So long as this Warrant remains outstanding, the Company shall reserve, free from preemptive or similar
rights, out of its authorized but unissued Common Shares, and solely for the purpose of effecting the exercise of this Warrant,
a sufficient number of Common Shares to provide for the exercise of this Warrant.

 

2.5 Valid
Issuance. All Common Shares issued upon exercise of this Warrant will, upon payment of the Exercise Price and issuance by
the Company, be duly authorized, validly and legally issued, fully paid and nonassessable and free and clear of all taxes, liens,
security interests, charges and other encumbrances or restrictions with respect to the issuance thereof and, without limiting
the generality of the foregoing, the Company shall take all actions necessary to ensure such result and shall not take any action
which will cause a contrary result.

 

2.6 Acknowledgment
of Rights. At the time of the exercise of this Warrant in accordance with the terms hereof and upon the written request of
the Holder hereof, the Company will acknowledge in writing its continuing obligation to afford to such Holder any rights to which
such Holder shall continue to be entitled after such exercise in accordance with the provisions of this Warrant; provided, however,
that if the Holder hereof shall fail to make any such request, such failure shall not affect the continuing obligation of the
Company to afford to such Holder any such rights.

 

2.7 Adjustment
of Number of Shares. To prevent dilution of the rights granted under this Warrant, the Exercise Price and the number of Common
Shares purchasable hereunder are subject to adjustment from time to time as follows:

 

(a) Conversion
or Redemption of Common Shares. Should all of the Common Shares be at any time prior to the Expiration Date redeemed, exchanged,
substituted or converted into shares or any other security of the Company, then this Warrant shall become immediately exercisable
prior to such event for that number of Common Shares equal to the number of Common Shares that would have been received if this
Warrant had been exercised in full and the Common Shares received thereupon had been simultaneously converted immediately prior
to such event, and the Exercise Price shall immediately be adjusted to equal the quotient obtained by dividing (i) the aggregate
Exercise Price of the maximum number of shares of Common Shares for which this Warrant was exercisable immediately prior to such
conversion, exchange, substitution or redemption, by (ii) the number of shares of Common Shares for which this Warrant is exercisable
immediately after such conversion, exchange, substitution or redemption.

 

    	HUSA – Warrant (2017 Bridge Loan)	3 	 

    	 

    

 

(b) Offer.
If at any time while this Warrant, or any portion hereof, is outstanding and unexpired there shall be an offer for all of the
Common Shares whether in the form of cash, securities or otherwise, then, as a part of such offer, lawful provision shall be made
so that the Holder of this Warrant shall thereafter be entitled to receive upon exercise of this Warrant, during the period specified
herein and upon payment of the Exercise Price then in effect, the number of shares or other securities of the offeror that a holder
of the Common Shares issuable upon exercise of this Warrant would have been entitled to receive in such offer if this Warrant
had been exercised immediately before such offer, all subject to further adjustment as provided in this Section 2.7. The
foregoing provisions of this Section 2.7(b) shall similarly apply to successive offers and to the shares that are at the
time receivable upon the exercise of this Warrant. If the per-share consideration payable to the Holder hereof for shares in connection
with any such offer is in a form other than cash or marketable securities, then the value of such consideration shall be determined
in good faith by the Company’s Board of Directors. In all events, appropriate adjustment (as determined in good faith by
the Company’s Board of Directors) shall be made in the application of the provisions of this Warrant with respect to the
rights and interests of the Holder after the transaction, to the end that the provisions of this Warrant shall be applicable after
that event, as near as reasonably may be, in relation to any shares or other property deliverable after that event upon exercise
of this Warrant.

 

(c) Reclassification.
If the Company, at any time while this Warrant, or any portion hereof, remains outstanding and unexpired by reclassification of
securities or otherwise, shall change any of the securities as to which purchase rights under this Warrant exist into the same
or a different number of securities of any other class or classes, this Warrant shall thereafter represent the right to acquire
such number and kind of securities as would have been issuable as the result of such change with respect to the securities that
were subject to the purchase rights under this Warrant immediately prior to such reclassification or other change and the Exercise
Price therefor shall be appropriately adjusted, all subject to further adjustment as provided in this Section 2.7. No adjustment
shall be made pursuant to this Section 2.7(c), upon any conversion, exchange, substitution or redemption of the Common
Shares that is the subject of Section 2.7(a).

 

(d) Split,
Subdivision or Combination of Shares. If the Company at any time while this Warrant, or any portion hereof, remains outstanding
and unexpired shall split, subdivide or consolidate the securities as to which purchase rights under this Warrant exist, into
a different number of securities of the same class, the Exercise Price for such securities shall be proportionately decreased
in the case of a split or subdivision or proportionately increased in the case of a combination and the number of Common Shares
issuable upon exercise of this Warrant shall be proportionately adjusted such that the aggregate Exercise Price of all Common
Shares issuable upon exercise of this Warrant shall remain unchanged.

 

(e) Adjustments
for Dividends in Shares or Other Securities or Property. If while this Warrant remains outstanding and unexpired, the holders
of the securities as to which purchase rights under this Warrant exist at the time shall have received, or, on or after the record
date fixed for the determination of eligible shareholders, shall have become entitled to receive, without payment therefor, other
or additional shares or other securities or property (other than cash) of the Company by way of dividend, then and in each case,
this Warrant shall represent the right to acquire, in addition to the number of shares of the security receivable upon exercise
of this Warrant, and without payment of any additional consideration therefor, the amount of such other or additional shares or
other securities or property (other than cash) of the Company that such holder would hold on the date of such exercise had it
been the holder of record of the security receivable upon exercise of this Warrant on the date hereof and had thereafter, during
the period from the date hereof to and including the date of such exercise, retained such shares and/or all other additional shares
available by it as aforesaid during such period, giving effect to all adjustments called for during such period by the provisions
of this Section 2.7.

 

    	HUSA – Warrant (2017 Bridge Loan)	4 	 

    	 

    

 

(f) Other
Dilutive Events. In case any event shall occur as to which the provisions of this Section 2.7 are not strictly applicable,
but the failure to make any adjustment would not fairly protect the purchase rights presented by the Warrants in accordance with
the essential intent and principles of this Section 2.7, then, in each such case, the Company shall make a good faith adjustment
to the Exercise Price and the number of Common Shares in accordance with the intent of this Section 2.7 and, upon the written
request of the Holder, shall appoint an independent financial expert, which shall give their opinion upon the adjustment, if any,
on a basis consistent with the essential intent and principles of this Section 2.7.

 

(g) Certificate
as to Adjustments. Upon the occurrence of each adjustment or readjustment pursuant to this Section 2.7, the Company
at its expense shall promptly compute such adjustment or readjustment in accordance with the terms hereof and furnish to each
Holder of this Warrant a certificate setting forth such adjustment or readjustment and showing in detail the facts upon which
such adjustment or readjustment is based. The Company shall, upon the written request, at any time, of any such Holder, furnish
or cause to be furnished to such Holder a like certificate setting forth: (i) such adjustments and readjustments, (ii) the Exercise
Price at the time in effect, and (iii) the number of shares and the amount, if any, of other property that at the time would be
received upon the exercise of the Warrant.

 

(h) No
Impairment. The Company will not, by any voluntary action, avoid or seek to avoid the observance or performance of any of
the terms to be observed or performed hereunder by the Company, but will at all times in good faith assist in the carrying out
of all the provisions of this Section 2.7 and in the taking of all such action as may be necessary or appropriate in order
to protect the rights of the Holder of this Warrant against impairment.

 

2.8 No
Fractional Common Shares. The Company shall not be required to issue any fractional Common Share on the exercise of this Warrant.
The number of full Common Shares which shall be issuable upon such exercise shall be computed on the basis of the aggregate number
of whole Common Shares purchasable on exercise of this Warrant so presented. If any fraction of a Common Shares would, except
for the provisions of this Section 2.8, be issuable on the exercise of this Warrant, the Company shall round up the total
number of Common Shares purchasable hereunder to the next whole Common Share.

 

ARTICLE
III

Transfer

 

3.1 Warrant
Office. The Company shall maintain an office for certain purposes specified herein (the “Warrant Office”),
which office shall be the Company’s principal executive offices, and may subsequently be such other office of the Company
or of any transfer agent of the Common Shares as to which written notice has previously been given to the Holder. The Company
shall maintain, at the Warrant Office, a register for this Warrant in which the Company shall record (a) the name and address
of the Person in whose name this Warrant has been issued (as well as the name and address of each permitted assignee of the rights
of the registered owner hereof) and (b) the number of Warrant Shares issuable upon the exercise or exchange hereof.

 

3.2 Ownership
of Warrant. The Company may deem and treat the Person in whose name this Warrant is registered as the Holder and owner hereof
until provided with written notice to the contrary.

 

3.3 Restrictions
on Transfer of Warrant.

 

(a) The
Warrant and the Warrant Shares are not transferable directly or indirectly, in whole or in part, except in the case of any transfer
that is in compliance with applicable U.S. federal and state securities laws, including the Securities Act. Any transfers of the
Warrant will be without charge to the Holder except that any securities transfer taxes due on transfer of the Warrant will be
paid by Holder. Restrictive legends setting forth the above restrictions on transfer will be set forth on any Warrant Shares issued
on exercise of the Warrant.

 

(b) Subject
to Section 3.3(a), the Holder may assign, convey or transfer this Warrant and any rights hereunder without the prior written
consent of the Company to any person that directly, or indirectly through one or more intermediaries, controls, is controlled
by, or is under common control with the Holder or the parent of the Holder, or a successor in interest to the Holder which acquires
the voting control of the Holder or all or substantially all of the Holder’s assets. The rights and obligations of the Company
and the Holder under this Warrant shall be binding upon and benefit their respective permitted successors, assigns, heirs, administrators
and transferees.

 

    	HUSA – Warrant (2017 Bridge Loan)	5 	 

    	 

    

 

ARTICLE
IV

Miscellaneous

 

4.1 Entire
Agreement. This Warrant contains the entire agreement between the Holder hereof and the Company with respect to the Warrant
Shares purchasable upon exercise hereof and the related transactions and supersede all prior arrangements or understandings with
respect thereto.

 

4.2 Governing
Law. This Warrant shall be a contract made under and governed by the internal laws of the State of Texas applicable to contracts
made and to be performed entirely within such state, without regard to conflict of law principles.

 

4.3 Waiver
and Amendment. Any term or provision of this Warrant may be waived at any time by the party which is entitled to the benefits
thereof. Any term or provision of this Warrant may be amended or supplemented at any time by agreement of the Holder hereof and
the Company. Any waiver of any term or condition, or any amendment or supplementation, of this Warrant shall be in writing. A
waiver of any breach or failure to enforce any of the terms or conditions of this Warrant shall not in any way affect, limit or
waive a party’s rights hereunder at any time to enforce strict compliance thereafter with every term or condition of this
Warrant.

 

4.4 Severability.
In the event that any one or more of the provisions contained in this Warrant shall be determined to be invalid, illegal or unenforceable
in any respect for any reason, the validity, legality and enforceability of any such provision in any other respect and the remaining
provisions of this Warrant shall not, at the election of the party for whom the benefit of the provision exists, be in any way
impaired.

 

4.5 Copy
of Warrants. A copy of this Warrant shall be filed among the records of the Company.

 

4.6 Notice.
Any notice or other document required or permitted to be given or delivered to the Holder hereof shall be in writing and delivered
at, or sent by certified or registered mail or by facsimile to such Holder at, the last address shown on the books of the Company
maintained at the Warrant Office for the registration of this Warrant or at any more recent address of which the Holder hereof
shall have notified the Company in writing. Any notice or other document required or permitted to be given or delivered to the
Company, other than such notice or documents required to be delivered to the Warrant Office, shall be delivered at, or sent by
certified or registered mail or by facsimile to, the Warrant Office.

 

4.7 Limitation
of Liability; Rights as a Shareholder. No provision hereof, in the absence of affirmative action by the Holder hereof to purchase
Common Shares, and no mere enumeration herein of the rights or privileges of the Holder hereof, shall give rise to any liability
of such Holder for the purchase price of any Common Shares or as a shareholder of the Company, whether such liability is asserted
by the Company or by creditors of the Company. Except as otherwise provided herein, this Warrant does not confer upon the Holder
any right to vote or consent to or to receive notice as a shareholder of the Company, in respect of any matters whatsoever.

 

4.8 Exchange,
Loss, Destruction, etc. of Warrant. Upon receipt of evidence reasonably satisfactory to the Company of the loss, theft, mutilation
or destruction of this Warrant, and in the case of any such loss, theft or destruction upon delivery of an appropriate affidavit
in such form as shall be reasonably satisfactory to the Company and include reasonable indemnification of the Company, or in the
event of such mutilation upon surrender and cancellation of this Warrant, the Company will make and deliver a new Warrant of like
tenor, in lieu of such lost, stolen, destroyed or mutilated Warrant. Any Warrant issued under the provisions of this Section
4.8 in lieu of any Warrant alleged to be lost, destroyed or stolen, or in lieu of any mutilated Warrant, shall constitute
an original contractual obligation on the part of the Company. This Warrant shall be promptly canceled by the Company upon the
surrender hereof in connection with any exchange or replacement. The Company shall pay all taxes (other than securities transfer
taxes or income taxes) and all other expenses and charges payable in connection with the preparation, execution and delivery of
Warrants pursuant to this Section.

 

    	HUSA – Warrant (2017 Bridge Loan)	6 	 

    	 

    

 

4.9 Piggyback
Registration Rights.

 

(a) The
Company covenants and agrees with any holder of the Registrable Securities that if, at any time within the period commencing on
the date hereof and ending on the Expiration Date, it proposes to file a registration statement with respect to any class of equity
or equity-related security (other than in connection with an offering to the Company’s employees or in connection with an
acquisition, merger or similar transaction) under the Securities Act in a primary registration on behalf of the Company and/or
in a secondary registration on behalf of holders of such securities and the registration form to be used may be used for registration
of the Registrable Securities, the Company will give prompt written notice (which, in the case of a registration statement pursuant
to the exercise of demand registration rights shall be within ten (10) business days after the Company’s receipt of notice
of such exercise and, in any event, shall be at least 30 days prior to such filing) to the holders of Registrable Securities at
the addresses appearing on the records of the Company of its intention to file a registration statement and will offer to include
in such registration statement all, but not less than 20% of the Registrable Securities, subject to paragraphs (i) and (ii) of
this Section 4.9(a), such number of Registrable Securities with respect to which the Company has received written requests for
inclusion therein within ten (10) days after the giving of notice by the Company. All registrations requested pursuant to this
Section 4.9(a) are referred to herein as “Piggyback Registrations”. All Piggyback Registrations pursuant to this Section
4.9 will be made solely at the Company’s expense. This Section is not applicable to a registration statement filed by the
Company on Forms S-4 or S-8 or any successor forms.

 

(i)
Priority on Primary Registrations. If a Piggyback Registration includes an underwritten primary registration on behalf
of the Company and the underwriter(s) for such offering determines in good faith and advises the Company in writing that in its/their
opinion the number of Registrable Securities requested to be included in such registration exceeds the number that can be sold
in such offering without materially adversely affecting the distribution of such securities by the Company, the Company will include
in such registration (A) first, the securities that the Company proposes to sell and (B) second, the Registrable Securities requested
to be included in such registration, apportioned pro rata among the holders of the Registrable Securities and holders of other
securities requesting registration.

 

(ii)
Priority on Secondary Registrations. If a Piggyback Registration consists only of an underwritten secondary registration
on behalf of holders of securities of the Company, and the underwriter(s) for such offering advises the Company in writing that
in its/their opinion the number of Registrable Securities requested to be included in such registration exceeds the number which
can be sold in such offering without materially adversely affecting the distribution of such securities, the Company will include
in such registration (A) first, the securities requested to be included therein by the holders requesting such registration, and
(B) second, the Registrable Securities requested to be included in such registration and securities of holder of other securities
requested to be included in such registration statement, pro rata among all such holders on the basis of the number of shares
requested to be included by each such holder, provided, however, the Company will use its best efforts to include not less than
20% of the Registrable Securities.

 

Notwithstanding
the foregoing, if any such underwriter shall determine in good faith and advise the Company in writing that the distribution of
the Registrable Securities requested to be included in the registration concurrently with the securities being registered by the
Company would materially adversely affect the distribution of such securities by the Company, then the holders of such Registrable
Securities shall delay their offering and sale for such period ending on the earliest of (1) 90 days following the effective date
of the Company’s registration statement, (2) the day upon which the underwriting syndicate, if any, for such offering shall
have been disbanded or, (3) such date as the Company, managing underwriter and holders of Registrable Securities shall otherwise
agree. In the event of such delay, the Company shall file such supplements, post-effective amendments and take any such other
steps as may be necessary to permit such holders to make their proposed offering and sale for a period of 120 days immediately
following the end of any such period of delay. If any party disapproves the terms of any such underwriting, it may elect to withdraw
therefrom by written notice to the Company, the underwriter, and the holder. Notwithstanding the foregoing, the Company shall
not be required to file a registration statement to include shares pursuant to this Section 4.9 if independent counsel, reasonably
satisfactory to the Company, renders an opinion to the Company that the Registrable Securities proposed to be disposed of may
be transferred pursuant to the provisions of Rule 144 under the Securities Act or otherwise without registration under the Securities
Act.

 

    	HUSA –  Warrant (2017 Bridge Loan)	7 	 

    	 

    

 

(b)
 In connection with the registration of Registrable Securities hereunder, the Company
agrees to (i) bear the expenses of any registration; provided, however, that in no event shall the Company be obligated to pay
(A) any fees and disbursements of special counsel for holders of Registrable Securities, (B) any underwriters’ discount
or commission in respect of such Registrable Securities, and (C) any stock transfer taxes attributable to the sale of the Registrable
Securities; (ii) use its best efforts to register or qualify the Registrable Securities for offer or sale under state securities
or Blue Sky laws of such jurisdictions in which such holders shall reasonably request, provided, however, that no qualification
shall be required in any jurisdiction where, as a result thereof, the Company would be subject to service of general process or
to taxation as a foreign corporation doing business in such jurisdiction to which it is not then subject; and (iii) enter into
a cross-indemnity agreement, in customary form, with each underwriter, if any, and each holder of securities included in such
registration statement.

 

(c) The
Company’s obligations under this Section 4.9 shall be conditioned upon a timely receipt by the Company in writing of: (i)
information as to the terms of such public offering furnished by or on behalf of each holder of Registrable Securities intending
to make a public offering of his, her or its Registrable Securities, and (ii) such other information as the Company may reasonably
require from such holders, or any underwriter for any of them, for inclusion in such registration statement.

 

[The
Remainder of this Page Intentionally Left Blank]

 

    	HUSA – Warrant (2017 Bridge Loan)	8 	 

    	 

    

 

IN
WITNESS WHEREOF, the Company has caused this Warrant to be signed in its name.

 

Dated:
________________, 2017.

 

	 	HOUSTON
    AMERICAN ENERGY CORP.
	 	 	 
	 	By:	 
	 	Name: 
    	John
    P. Boylan
	 	Title:
    	President

 

THIS
IS A SIGNATURE PAGE TO THE WARRANT

 

    	HUSA – Warrant (2017 Bridge Loan)	 	 

    	 

    

 

EXHIBIT
A

 

SUBSCRIPTION
NOTice

 

Date:
_______________, 2017

 

Houston
American Energy Corp.

801
Travis St., Suite 1425

Houston,
TX 77002

Attention:
John P. Boylan

 

Ladies
and Gentlemen:

 

The
undersigned (the “Purchaser”) hereby elects to exercise this Warrant issued to it by Houston American Energy
Corp. (the “Company”) and dated as of _____________, 2017 (the “Warrant”) and to purchase
thereunder _____________ shares of Common Stock of the Company (the “Common Shares”) at a purchase price of
$0.50 per Share, or an aggregate purchase price of $__________ (the “Purchase Price”).

 

In
connection with the exercise of the Warrant, the Purchaser hereby represents, warrants, covenants and agrees as follows:

 

(a) Accredited
Investor. The Purchaser is an “accredited investor” within the meaning of Rule 501 of Regulation D under the Securities
Act of 1933, as amended (together with the rules and regulations promulgated by the Securities and Exchange Commission thereunder,
the “Securities Act”).

 

(a) Investment
Experience. The Purchaser has sufficient knowledge and experience in business, financial and investment matters so as to be
able to evaluate the risks and merits of its investment in the Company and it is able financially to bear the risks thereof.

 

(b) Company
Information; No General Solicitation. The Purchaser had access to such information regarding the Company and its affairs as
is necessary to enable it to evaluate the merits and risks of an investment in restricted securities of the Company and has had
a reasonable opportunity to ask questions and receive answers and documents concerning the Company and its current and proposed
operations, financial condition, business, business plans and prospects. The Purchaser has not been offered any of the Common
Shares by any means of general solicitation or advertising.

 

(c) Acquisition
for Own Account. The Common Shares being issued to and acquired by the Purchaser are being acquired by it for its own account
for the purpose of investment and not with a view to, or for resale in connection with, any distribution thereof. The Purchaser
understands that it must bear the economic risk of such investment indefinitely, and hold the Common Shares indefinitely, unless
a subsequent disposition of the Common Shares is registered pursuant to the Securities Act, or an exemption from such registration
is available. The Purchaser further understands that there is no assurance that any exemption from the Securities Act will be
available or, if available, that such exemption will allow it to dispose of or otherwise transfer any or all of the Common Shares
under the circumstances, in the amounts or at the times the Purchaser might propose.

 

(d) Restricted
Securities.

 

(i) The
Purchaser understands and acknowledges that none of the offer, issuance or sale of the Common Shares has been registered under
the Securities Act in reliance on an exemption from the registration requirements of the Securities Act.

 

(ii) The
Purchaser understands and acknowledges that the Common Shares may be subject to additional restrictions on transfer under state
and/or federal securities laws.

 

    	HUSA – Warrant (2017 Bridge Loan)	 	 

    	 

    

 

Pursuant
to the terms of the Warrant, the undersigned has delivered the Purchase Price herewith in full in cash, by certified check or
wire transfer pursuant to the provisions thereof.

 

	 	Very
    truly yours,
	 	 
	 	[Holder]
	 	 	         
	 	By:	 
	 	Name: 	 
	 	Title:	 

 

    	HUSA – Warrant (2017 Bridge Loan)

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