diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 1b4f5a2f9ae0418abe5a9f9894cca165366355b1..ccbc92db78ae9e62f1bf9a3ee001c239ef20056a 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -31,6 +31,8 @@ jobs:
         steps:
         -   uses: actions/checkout@v4
         -   uses: actions/setup-python@v5
+            with:
+                python-version: '3.x'
         -   run: |
                 pip install cffconvert
                 cffconvert -i CITATION.cff --validate