diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index d42160c9..b18ff656 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -8,7 +8,7 @@ jobs:
     strategy:
       max-parallel: 4
       matrix:
-        python-version: [3.7, 3.10]
+        python-version: [3.7, "3.10"]
 
     # service containers to run with `postgres-job`
     services: