diff --git a/.github/workflows/run_unit_tests.yml b/.github/workflows/run_unit_tests.yml
index 53434340..4a267824 100644
--- a/.github/workflows/run_unit_tests.yml
+++ b/.github/workflows/run_unit_tests.yml
@@ -13,7 +13,7 @@ jobs:
       image: unhumbleben/nupack:latest
     strategy:
       matrix:
-        python-version: [ "3.7", "3.8", "3.9", "3.10", "3.11", "3.12" ]
+        python-version: [ 3.7, 3.8, 3.9 ]
 
     steps:
       - uses: actions/checkout@v3