diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e7f3549..08f61c4 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -20,7 +20,8 @@ jobs:
           - 7.3
           - 7.4
         phpunit-version:
-          - 8.5.2
+#          - 8.5.2
+          - 7
         dependencies:
           - lowest
           - highest
diff --git a/composer.json b/composer.json
index 7677496..7b18724 100644
--- a/composer.json
+++ b/composer.json
@@ -31,7 +31,7 @@
     "ext-json": "*"
   },
   "require-dev": {
-    "phpunit/phpunit": "^8.0",
+    "phpunit/phpunit": "^7",
     "mockery/mockery": "^1"
   },
   "scripts": {