diff --git a/.github/workflows/php.yml b/.github/workflows/php.yml
index 982159a71..242ee17fd 100644
--- a/.github/workflows/php.yml
+++ b/.github/workflows/php.yml
@@ -8,7 +8,7 @@ jobs:
     strategy:
       matrix:
         operating-system: [ubuntu-latest, windows-latest, macos-latest]
-        php-versions: ['7.3', '7.4']
+        php-versions: ['7.2', '7.3', '7.4']
         dependency-version: [prefer-lowest, prefer-stable]
         tools: ['test', 'lint']
 
diff --git a/composer.json b/composer.json
index 1b62b0173..dba6b9220 100644
--- a/composer.json
+++ b/composer.json
@@ -22,11 +22,11 @@
     },
     "require-dev": {
         "simpletest/simpletest": "^1.2.0",
-        "phpunit/phpunit": "^9.0",
+        "phpunit/phpunit": "^8.0 | ^9.0",
         "mockery/mockery": "^1.3",
         "vimeo/psalm": "^3.11",
         "pear/net_idna2": "^0.2.0",
-        "infection/infection": "^0.16.3",
+        "infection/infection": "^0.15.0 | ^0.16.0",
         "cerdic/css-tidy": "^1.7",
         "squizlabs/php_codesniffer": "^3.5",
         "sensiolabs/security-checker": "^6.0",