diff --git a/gui/kivy/tools/buildozer.spec b/gui/kivy/tools/buildozer.spec
index b3679889d..1e910314b 100644
--- a/gui/kivy/tools/buildozer.spec
+++ b/gui/kivy/tools/buildozer.spec
@@ -31,7 +31,7 @@ version.filename = %(source.dir)s/contrib/versions.py
 #version = 1.9.8
 
 # (list) Application requirements
-requirements = python3crystax, android, openssl, plyer, kivy==master
+requirements = python3crystax==3.6, android, openssl, plyer, kivy==master
 
 # (str) Presplash of the application
 #presplash.filename = %(source.dir)s/gui/kivy/theming/splash.png