diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 7c56bc5..579cbf2 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -122,7 +122,8 @@ jobs:
     - uses: actions/checkout@v2
     - name: Install Python dependencies
       run: |
-        python3 -m pip install --upgrade pip setuptools wheel
+        python3 -m pip install pip=20.1.1
+        python3 -m pip install --upgrade setuptools wheel
         pip3 --version
     - name: Install Wasienv
       run: curl https://raw.githubusercontent.com/wasienv/wasienv/master/install.sh | sh