diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
index a343402..29be9db 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -13,19 +13,19 @@ jobs:
       matrix:
         include:
           - version: "2.7.18"
-            dist: stretch
+            dist: buster
             python: python
           - version: "3.6.14"
-            dist: stretch
+            dist: bullseye
             python: python
           - version: "3.7.11"
-            dist: stretch
+            dist: bullseye
             python: python
           - version: "3.8.11"
-            dist: buster
+            dist: bullseye
             python: python
           - version: "3.9.6"
-            dist: buster
+            dist: bullseye
             python: python
           - version: "2.7"
             version_suffix: "-7.3.5"
@@ -35,6 +35,10 @@ jobs:
             version_suffix: "-7.3.3"
             dist: buster
             python: pypy
+          - version: "3.7"
+            version_suffix: "-7.3.5"
+            dist: bullseye
+            python: pypy
           
     steps:
       - uses: actions/checkout@v2