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UNITED STATESSECURITIES AND EXCHANGE COMMISSIONWashington, D.C. 20549

FORM 10-K/A

(AMENDMENT NO. 1)

[X] ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE
SECURITIES EXCHANGE ACT OF 1934

For the Fiscal Year Ended November 30, 2017

OR

[   ] TRANSITION REPORT PURSUANT TO SECTION 13 OR
15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

Commission File No. - None

SECURITY DEVICES INTERNATIONAL
INC.(Name of Small Business Issuer in its charter)

|Delaware                                         | 71-1050654                          
|------------------------------------------------ | ------------------------------------
|(State or other jurisdiction of incorporation or | (I.R.S. Employer Identification No.)
|organization)                                    |                                     

|107 Audubon Road, Bldg 2, Suite 201     | 01880   
|--------------------------------------- | --------
|Wakefield, Massachusetts                |         
|(Address of Principal Executive Office) | Zip Code

Registrants telephone number, including
Area Code: (905) 582-6402

Securities registered pursuant to
Section 12(b) of the Act: None

Securities registered pursuant to
Section 12(g) of the Act: None

Indicate by check mark if the registrant is a well-known
seasoned issuer, as defined in Rule 405 of the Securities Act. [  
]

Indicate by check mark if the registrant is not required to
file reports pursuant to Section 13 or Section 15(d) of the Act. [  
]

Indicate by check mark whether the registrant (1) has filed all
reports to be filed by Section 13 or 15(d) of the Securities Exchange Act of
1934 during the preceding 12 months (or for such shorter period that the
registrant was required to file such reports), and (2) has been subject to such
filing requirements for the past 90 days. Yes [X]     No
[   ]

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Indicate by check mark whether the registrant has submitted
electronically and posted on its corporate Web site, if any, every Interactive
Data File required to be submitted and posted pursuant to Rule 405 of Regulation
S-T (§232.405 of this chapter) during the preceding 12 months (or for such
shorter period that the registrant was required to submit and post such files).
Yes [X]     No [   ]

Indicate by check mark if disclosure of delinquent filers
pursuant to Item 405 of Regulation S-K is not contained herein, and will not be
contained, to the best of Registrants knowledge, in definitive proxy or
information statements incorporated by reference in Part III of this Form 10-K
or any amendment to this Form 10-K. [X]

Indicate by check mark whether the registrant is a large
accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller
reporting company. See the definitions of large accelerated filer,
accelerated filer and smaller reporting company in Rule 12b-2 of the
Exchange Act.

|Larger accelerated filer [   ] | Accelerated filer [   ]      
|------------------------------ | -----------------------------
|Non-accelerated filer [   ]    | Smaller reporting company [X]

Indicate by check mark whether the registrant is a shell
company (as defined in Rule 12b-2 of the Act): Yes [  
]     No [X]

The aggregate market value of the Common Stock held by
non-affiliates of the issuer, as of May 31, 2017, was approximately $6,000,000
based upon a share valuation of $0.14 per share. This share valuation is based
upon the closing price of the Companys shares as of May 31, 2017 (the date of
the last sale of the Companys shares closest to the end of the Companys second
fiscal quarter). For purposes of this disclosure, shares of Common Stock held by
persons who the issuer believes beneficially own more than 5% of the outstanding
shares of Common Stock and shares held by officers and directors of the issuer
have been excluded because such persons may be deemed to be affiliates of the
issuer.

As of March 13, 2018, the Company had 93,861,054 issued and
outstanding shares of common stock.

Documents incorporated by reference: None

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EXPLANATORY NOTE

This Amendment No. 1 on Form 10-K/A amends Security Devices
International Inc.s (the Company) Annual Report on Form 10-K for the fiscal
year ended November 30, 2017, as filed with the Securities and Exchange
Commission (SEC) on March 15, 2018 (the Original Filing) to amend and
supplement Items 4, 13 and 15.

As required by Rule 12b-15 under the Securities Exchange Act of
1934, as amended, this Amendment No. 1 includes new certifications from the
Companys principal executive officer and principal financial officers, dated as
of the date of filing of this Amendment No. 1. Amendment No. 1 speaks as of the
date of the Original Filing, does not reflect events that may have occurred
after the date of the Original Filing and does not modify or update in any way
the disclosures made in the Original Filing, except as described above.
Accordingly, this Amendment No. 1 should be read in conjunction with the
Original Filing.

ITEM 4.MINE SAFETY DISCLOSURES

Not applicable.

ITEM 13.CERTAIN RELATIONSHIPS AND RELATED
TRANSACTIONS

See Items 10, 11 and 12, as well as footnote 8 to the Companys
audited annual financial statements.

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ITEM 15.EXHIBITS

|Exhibit |                                                                                                                                                                                                                                                                                                                         
|------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|Number  | Description of Exhibit                                                                                                                                                                                                                                                                                                  
|        |                                                                                                                                                                                                                                                                                                                         
|3.1*    | Certificate of Incorporation of the Company.                                                                                                                                                                                                                                                                            
|        |                                                                                                                                                                                                                                                                                                                         
|3.2     | Bylaws of the Company Bylaws of the Company (incorporated
      by reference to Exhibit 3.2 to the Company's registration statement on
      Form SB-2 filed on March 16, 2006).                                                                                                                                        
|        |                                                                                                                                                                                                                                                                                                                         
|4.1     | Trust Indenture dated December 7, 2016 by and among the
      Company, Security Devices International Canada Corp., and TSX Trust
      Company (incorporated by reference to Exhibit 10.2 to the Companys
      Current Report on Form 8-K filed on December 13, 2016).                                               
|        |                                                                                                                                                                                                                                                                                                                         
|10.1*   | 2017 Revised Stock Option Plan of the Company.                                                                                                                                                                                                                                                                          
|        |                                                                                                                                                                                                                                                                                                                         
|10.2*  | Consulting Agreement dated June 15, 2016 between the
      Company and Northeast Industrial Partners, LLC, as amended by Extension
      Agreement to Consulting Agreement, dated May 1, 2017, between the Company
      and Northeast Industrial Partners, LLC.                                                        
|        |                                                                                                                                                                                                                                                                                                                         
|10.3    | Securities Purchase Agreement dated December 7, 2016 by
      and among the Company, Northeast Industrial Partners, LLC, as collateral
      agent, and certain purchasers party thereto (incorporated by reference to
      Exhibit 10.1 to the Companys Current Report on Form 8-K filed on December
      13, 2016).
|        |                                                                                                                                                                                                                                                                                                                         
|10.4*  | Employment Agreement dated January 1, 2017 between the
      Company and Dean Thrasher.                                                                                                                                                                                                                                 
|        |                                                                                                                                                                                                                                                                                                                         
|10.5*   | Manufacturing Supply Agreement dated August 11, 2017
      between the Company and Micron Products, Inc.                                                                                                                                                                                                                
|        |                                                                                                                                                                                                                                                                                                                         
|10.6*  | Employment Letter dated August 28, 2017 between the
      Company and Paul Jensen.                                                                                                                                                                                                                                      
|        |                                                                                                                                                                                                                                                                                                                         
|10.7*   | Registration Rights Agreement dated as of November 28,
      2017 by and between the Company and the Selling Shareholders.                                                                                                                                                                                              
|        |                                                                                                                                                                                                                                                                                                                         
|10.8*   | Subscription Agreement (form) dated as of November 28,
      2017 by and between the Company and each Selling Shareholder with respect
      to the purchase and sale of the Units.                                                                                                                                     
|        |                                                                                                                                                                                                                                                                                                                         
|10.9*   | License and Supply Agreement dated as of May 1,
    2017 between the Company and Safariland, LLC.                                                                                                                                                                                                                       
|        |                                                                                                                                                                                                                                                                                                                         
|16.1    | Letter of Schwartz Levitsky Feldman LLP dated November
      30, 2017 (incorporated by reference to Exhibit 99.1 to the Companys
      Current Report on Form 8-K filed on December 4, 2017).                                                                                                                          
|        |                                                                                                                                                                                                                                                                                                                         
|16.2    | Letter of Schwartz Levitsky Feldman LLP dated November
      30, 2017 (incorporated by reference to Exhibit 99.2 to the Companys
      Current Report on Form 8-K filed on December 4, 2017).                                                                                                                          
|        |                                                                                                                                                                                                                                                                                                                         
|16.3    | Letter of Schwartz Levitsky Feldman LLP dated December 1,
      2017 (incorporated by reference to Exhibit 99.3 to the Companys Current
      Report on Form 8-K filed on December 4, 2017).                                                                                                                           
|        |                                                                                                                                                                                                                                                                                                                         
|21.1    | Subsidiaries of the Company (incorporated by reference to
      Exhibit 21.1 to the Companys Annual report on Form 10-K filed on March
      15, 2018).                                                                                                                                                                
|        |                                                                                                                                                                                                                                                                                                                         
|31.1*   | Rule 13a-14(a) Certifications                                                                                                                                                                                                                                                                                           
|        |                                                                                                                                                                                                                                                                                                                         
|31.2*   | Rule 13a-14(a) Certifications                                                                                                                                                                                                                                                                                           
|        |                                                                                                                                                                                                                                                                                                                         
|32.1*   | Section 1350 Certifications                                                                                                                                                                                                                                                                                             

* Filed with this report. Management Contract

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SIGNATURES

Pursuant to the requirements of the Section 13 or 15(d) of the
Securities Exchange Act of 1934, as amended, the Registrant has duly caused this
report to be signed on its behalf by the undersigned, thereunto duly authorized,
on the 28th day of March, 2018.

SIGNATURE
    
    TITLE
    DATE/s/ Dean Thrasher
    
    Chief Executive Officer
    March 28, 2018Dean Thrasher
    
    and Director/s/ Rakesh
      Malhotra
    
    Chief Financial Officer
    March 28, 2018Rakesh MalhotraSIGNATURE
    
    TITLE
    DATE/s/ Dean Thrasher
    
    Chief Executive Officer
    March 28, 2018Dean Thrasher
    
    and Director/s/ Bryan Ganz
    
    Executive Chairman
    March 28, 2018Bryan Ganz/s/ Karen Bowling
    
    Director
    March 28, 2018Karen Bowling/s/ Don Levantin
    
    Director
    March 28, 2018Don Levantin


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