diff --git a/.github/workflows/pyinstaller.yml b/.github/workflows/pyinstaller.yml
index 386a600..faffa8c 100644
--- a/.github/workflows/pyinstaller.yml
+++ b/.github/workflows/pyinstaller.yml
@@ -13,7 +13,7 @@ jobs:
       - name: Install dependency env
         uses: actions/setup-python@v2
         with:
-              python-version: '3.x' # Version range or exact version of a Python version to use, using SemVer's version range syntax
+              python-version: '3.9.x' # Version range or exact version of a Python version to use, using SemVer's version range syntax
               architecture: 'x64' # optional x64 or x86. Defaults to x64 if not specified
       - name: Install dependencies
         run: |