diff --git a/.github/workflows/continuous-integration.yml b/.github/workflows/continuous-integration.yml
index 5f50472f5..185e383cc 100644
--- a/.github/workflows/continuous-integration.yml
+++ b/.github/workflows/continuous-integration.yml
@@ -14,7 +14,7 @@ jobs:
             fail-fast: false
             matrix:
                 operating-system: [ubuntu-latest, windows-latest, macOS-latest]
-                php-versions: ['7.2', '7.3', '7.4']
+                php-versions: ['7.1', '7.2', '7.3', '7.4']
 
         steps:
             - name: Set git to use LF
diff --git a/composer.json b/composer.json
index 68d259ffb..d18e8a73e 100644
--- a/composer.json
+++ b/composer.json
@@ -20,14 +20,14 @@
         "psr/cache": "^1.0"
     },
     "require-dev": {
-        "drupol/php-conventions": "^1.8.5",
+        "drupol/php-conventions": "^1.7.2 || ^1.8.5",
         "friends-of-phpspec/phpspec-code-coverage": "^4.3.2",
-        "infection/infection": "^0.15.3",
+        "infection/infection": "^0.13.6 || ^0.15.3",
         "phpbench/phpbench": "^0.16.10 || ^0.17.1",
-        "phpspec/phpspec": "^6.2.1",
-        "phpstan/phpstan": "^0.12.32",
+        "phpspec/phpspec": "^5.1.2 || ^6.2.1",
+        "phpstan/phpstan": "^0.12.33",
         "phpstan/phpstan-strict-rules": "^0.12",
-        "symfony/cache": "^5.1",
+        "symfony/cache": "^4.4 || ^5.1",
         "vimeo/psalm": "^3.12.2"
     },
     "config": {