diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 4a9952c47..152940671 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -52,11 +52,11 @@ jobs:
 
         # pinned deps
         - os: ubuntu-18.04
-          python-version: 3.6.1
+          python-version: 3.6.12
           env:
             TOXENV: pinned
         - os: ubuntu-18.04
-          python-version: 3.6.1
+          python-version: 3.6.12
           env:
             TOXENV: asyncio-pinned
         # - os: windows-latest