diff --git a/.github/workflows/continuous-integration.yml b/.github/workflows/continuous-integration.yml
index e31170d..2679513 100644
--- a/.github/workflows/continuous-integration.yml
+++ b/.github/workflows/continuous-integration.yml
@@ -13,3 +13,5 @@ jobs:
   phpunit:
     name: "PHPUnit"
     uses: "doctrine/.github/.github/workflows/continuous-integration.yml@1.4.1"
+    with:
+      php-versions: '["7.1", "7.2", "7.3", "7.4", "8.0", "8.1"]'
diff --git a/composer.json b/composer.json
index 49a5aa1..ac7e4bd 100644
--- a/composer.json
+++ b/composer.json
@@ -17,12 +17,12 @@
         {"name": "Johannes Schmitt", "email": "schmittjoh@gmail.com"}
     ],
     "require": {
-        "php": "^7.2 || ^8.0"
+        "php": "^7.1 || ^8.0"
     },
     "require-dev": {
         "doctrine/coding-standard": "^9.0",
         "phpstan/phpstan": "1.3",
-        "phpunit/phpunit": "^8.2 || ^9.4",
+        "phpunit/phpunit": "^7.5 || ^8.5 || ^9.5",
         "vimeo/psalm": "^4.11"
     },
     "autoload": {
diff --git a/phpcs.xml.dist b/phpcs.xml.dist
index b92854e..3c18ac3 100644
--- a/phpcs.xml.dist
+++ b/phpcs.xml.dist
@@ -6,7 +6,7 @@
     <arg name="cache" value=".phpcs-cache"/>
     <arg name="colors" />
 
-    <config name="php_version" value="70200"/>
+    <config name="php_version" value="70100"/>
 
     <!-- Ignore warnings and show progress of the run -->
     <arg value="np"/>