diff --git a/.github/workflows/run_test.yml b/.github/workflows/run_test.yml
index f5dfde3..3dafc05 100644
--- a/.github/workflows/run_test.yml
+++ b/.github/workflows/run_test.yml
@@ -47,6 +47,8 @@ jobs:
           submodules: 'recursive'
       - name: Set up MATLAB
         uses: matlab-actions/setup-matlab@v1
+        with:
+          release: R2020a
       - name: Run MATLAB test
         uses: matlab-actions/run-command@v1
         with: