diff --git a/.appveyor.yml b/.appveyor.yml
index 5ca5bebb..d22656a4 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -10,7 +10,7 @@ install:
     - copy %PYTHON%\python.exe %PYTHON%\python3.exe
     - SET PATH=%PYTHON%;%PYTHON%\Scripts;C:\strawberry\c\bin;C:\strawberry\perl\site\bin;C:\strawberry\perl\bin;%PATH%
     - python3 -mpip install Pillow attrs configobj flake8 flake8-import-order
-        pycotap pygame pyinstaller pysol-cards random2 setuptools six
+        pycotap pygame pyinstaller==5.3 pysol-cards random2 setuptools six
         ttkthemes
     - perl -v
     - copy C:\msys64\mingw64\bin\mingw32-make.exe C:\msys64\mingw64\bin\make.exe