diff --git a/.github/workflows/test.yaml b/.github/workflows/test.yaml
index 3b261d3..7ee5a81 100644
--- a/.github/workflows/test.yaml
+++ b/.github/workflows/test.yaml
@@ -36,7 +36,7 @@ jobs:
         continue-on-error: '${{ matrix.failure }}'
       - name: 'Psalm'
         run: |
-          composer require --dev vimeo/psalm
+          composer require --dev 'vimeo/psalm=^4.0|^5.0'
           php vendor/bin/psalm --shepherd --php-version=${{ matrix.php }}
         continue-on-error: '${{ matrix.failure }}'
       - name: 'Infection'