diff --git a/.github/workflows/R_CDM_check_hades.yaml b/.github/workflows/R_CDM_check_hades.yaml
index 8890173..83e28bc 100644
--- a/.github/workflows/R_CDM_check_hades.yaml
+++ b/.github/workflows/R_CDM_check_hades.yaml
@@ -57,7 +57,7 @@ jobs:
 
       - uses: actions/setup-python@v5
         with:
-          python-version=`3.11`
+          python-version: '3.11'
   
       - name: Install system requirements
         if: runner.os == 'Linux'