diff --git a/.github/workflows/python-publish-linux.yml b/.github/workflows/python-publish-linux.yml
index 18550be5..df8030b2 100644
--- a/.github/workflows/python-publish-linux.yml
+++ b/.github/workflows/python-publish-linux.yml
@@ -22,7 +22,7 @@ jobs:
     - name: Set up Python
       uses: actions/setup-python@v2
       with:
-        python-version: '3.x'
+        python-version: '3.9'
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
diff --git a/.github/workflows/python-publish-macos.yml b/.github/workflows/python-publish-macos.yml
index 34ae492b..65ad8a50 100644
--- a/.github/workflows/python-publish-macos.yml
+++ b/.github/workflows/python-publish-macos.yml
@@ -22,7 +22,7 @@ jobs:
     - name: Set up Python
       uses: actions/setup-python@v2
       with:
-        python-version: '3.x'
+        python-version: '3.9'
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
diff --git a/.github/workflows/python-publish-win.yml b/.github/workflows/python-publish-win.yml
index aff63278..56b9e08e 100644
--- a/.github/workflows/python-publish-win.yml
+++ b/.github/workflows/python-publish-win.yml
@@ -22,7 +22,7 @@ jobs:
     - name: Set up Python
       uses: actions/setup-python@v2
       with:
-        python-version: '3.x'
+        python-version: '3.9'
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip