diff --git a/README.md b/README.md
index 4b80fa05..cdfa2cab 100644
--- a/README.md
+++ b/README.md
@@ -12,7 +12,7 @@ Plugin for PHP_CodeSniffer static analysis tool that adds analysis of problemati
 
 ### Requirements
 
-VariableAnalysis requires PHP 5.6 or higher and [PHP CodeSniffer](https://github.com/squizlabs/PHP_CodeSniffer) version **3.0.2** or higher.
+VariableAnalysis requires PHP 5.6 or higher and [PHP CodeSniffer](https://github.com/squizlabs/PHP_CodeSniffer) version **3.1.0** or higher.
 
 ### With PHPCS Composer Installer
 
diff --git a/composer.json b/composer.json
index c7ec8443..dfe8bea7 100644
--- a/composer.json
+++ b/composer.json
@@ -35,13 +35,13 @@
         "phpstan": "./vendor/bin/phpstan analyse -l 7 VariableAnalysis"
     },
     "require" : {
-        "php" : ">=5.6.0"
+        "php" : ">=5.6.0",
+        "squizlabs/php_codesniffer": "^3.1"
     },
     "require-dev": {
         "dealerdirect/phpcodesniffer-composer-installer": "^0.4.4",
         "phpunit/phpunit": "^6.5",
         "sirbrillig/phpcs-import-detection": "^1.1",
-        "squizlabs/php_codesniffer": "^3.1",
         "limedeck/phpunit-detailed-printer": "^3.1",
         "phpstan/phpstan": "^0.11.8"
     }