diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index c6ce179..9636b9c 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -37,7 +37,7 @@ jobs:
             tox_env: py38
           - py_version: 3.9
             tox_env: py39
-          - py_version: 3.10
+          - py_version: "3.10"
             tox_env: py310
 
     # the steps of the CI