diff --git a/.github/workflows/test.yaml b/.github/workflows/test.yaml
index 056bc6a..0e431a6 100644
--- a/.github/workflows/test.yaml
+++ b/.github/workflows/test.yaml
@@ -14,6 +14,7 @@ jobs:
     strategy:
       matrix:
         php:
+          - 7.1
           - 7.2
           - 7.3
           - 7.4
diff --git a/composer.json b/composer.json
index 8b0ee6b..f21d722 100644
--- a/composer.json
+++ b/composer.json
@@ -30,7 +30,7 @@
         ]
     },
     "require-dev": {
-        "phpunit/phpunit": "^7.0",
+        "phpunit/phpunit": ">=7.0",
         "friendsofphp/php-cs-fixer": "^2.16"
     },
     "scripts": {