diff --git a/.github/workflows/workflow.yml b/.github/workflows/workflow.yml
index fdeba53..2df5e24 100644
--- a/.github/workflows/workflow.yml
+++ b/.github/workflows/workflow.yml
@@ -158,7 +158,7 @@ jobs:
   test-cython-wheels-27:
     runs-on: ubuntu-latest
 
-    container: coatldev/six:latest
+    container: python:2.7.18
     needs:
     - build-cython-wheels