Yes, you can use another keto-friendly flour instead of almond flour for the crust. If you don't want to bother changing the ratios, you may use sunflower seed flour or pumpkin seed meal. Both flours have a 1:1 ratio to almond flour. Another keto-friendly flour you can substitute almond flour with is coconut flour. It's more absorbent though, so you may have to adjust the moisture of your crust. If you don't want to remove almond flour completely from the equation, you can use a combination of it and coconut flour (a popular combo for keto recipes). Be aware though that the texture of the crust might change if you use flour other than keto flour.