diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 004010c0..46a0c7b6 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -17,8 +17,8 @@ jobs:
     timeout-minutes: 180
     strategy:
       matrix:
-        python-version: [ 3.7, 3.8, 3.9, 3.10.7 ]
-        tf-version: [ 2.6.0, 2.7.0, 2.8.0, 2.9.0, 2.10.0 ]
+        python-version: [ '3.7', '3.8', '3.9', '3.10' ]
+        tf-version: [ '2.6.0', '2.7.0', '2.8.0', '2.9.0', '2.10.0' ]
 
         exclude:
           - python-version: 3.7