diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 08f61c4..fa1f9b0 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -21,7 +21,7 @@ jobs:
           - 7.4
         phpunit-version:
 #          - 8.5.2
-          - 7
+          - 7.5.20
         dependencies:
           - lowest
           - highest