diff --git a/.github/workflows/prepare-release.yml b/.github/workflows/prepare-release.yml
index e6f64e307c..3872b449d9 100644
--- a/.github/workflows/prepare-release.yml
+++ b/.github/workflows/prepare-release.yml
@@ -8,6 +8,8 @@ jobs:
   build:
 
     runs-on: ubuntu-latest
+    container:
+      image: python:2.7.18-buster
 
     steps:
     - uses: actions/checkout@v2
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index b3692606e5..f75e9a96ae 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -8,6 +8,8 @@ jobs:
   build:
 
     runs-on: ubuntu-latest
+    container:
+      image: python:2.7.18-buster
 
     steps:
     - uses: actions/checkout@v2