diff --git a/.github/workflows/on-pull-request.yml b/.github/workflows/on-pull-request.yml
index f6aa128..dac0c00 100644
--- a/.github/workflows/on-pull-request.yml
+++ b/.github/workflows/on-pull-request.yml
@@ -6,14 +6,24 @@ on:
       - main
 
 jobs:
+  php-versions:
+    runs-on: ubuntu-latest
+    outputs:
+      matrix: ${{ steps.php-versions.outputs.matrix }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v6
+      - name: Determine supported PHP versions
+        id: php-versions
+        uses: antfroger/php-version-action@v1
+
   tests:
+    needs: php-versions
     runs-on: ${{ matrix.os }}
     strategy:
       max-parallel: 2
       matrix:
-        php:
-          - 8.3
-          - 8.4
+        php: ${{ fromJson(needs.php-versions.outputs.matrix) }}
         os:
           - ubuntu-latest
     name: PHP ${{ matrix.php }}; ${{ matrix.os }}