diff --git a/.github/workflows/black.yml b/.github/workflows/black.yml
index afa9cf2b3..5fc849d61 100644
--- a/.github/workflows/black.yml
+++ b/.github/workflows/black.yml
@@ -8,6 +8,6 @@ jobs:
     steps:
       - uses: actions/checkout@v2
       - uses: actions/setup-python@v2
-      - uses: psf/black@stable
+      - uses: psf/black@20.8b1
         with:
           args: ". --check -l 80 -S"