diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 23a8fb4..ca174ca 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -9,6 +9,9 @@ on:
 jobs:
   build:
     runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: ["3.9"]
 
     steps:
     - uses: actions/checkout@v3