diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 1017d0d..1bafead 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -56,7 +56,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v4
         with:
-          python-version: "3.x"
+          python-version: "3.9"
       - name: Set Poetry cache
         uses: actions/cache@v3
         id: poetry-cache
@@ -87,7 +87,7 @@ jobs:
       - name: Setup Python
         uses: actions/setup-python@v4
         with:
-          python-version: "3.x"
+          python-version: "3.9"
       - name: Check release
         id: check_release
         run: |