diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 82bd70a62b..1a905b3cfb 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -35,13 +35,13 @@ jobs:
         vectfit: [n]
 
         include:
-          - python-version: 3.7
+          - python-version: "3.7"
             omp: n
             mpi: n
-          - python-version: 3.8
+          - python-version: "3.8"
             omp: n
             mpi: n
-          - python-version: 3.9
+          - python-version: "3.9"
             omp: n
             mpi: n
           - python-version: "3.11"