diff --git a/Makefile b/Makefile
index a4e4065..4dcba86 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,9 @@
 .PHONY: *
 
+phpcs:
+	php vendor/bin/phpcs --standard=PSR2 src tests
+
 phpunit:
 	php vendor/bin/phpunit -v --color=always --testdox tests
 
-test: phpunit
-
+test: phpunit phpcs
diff --git a/composer.json b/composer.json
index eb0cac6..8a173dd 100644
--- a/composer.json
+++ b/composer.json
@@ -23,6 +23,7 @@
         }
     },
     "require-dev": {
-        "phpunit/phpunit": "^9.1"
+        "phpunit/phpunit": "^9.1",
+        "squizlabs/php_codesniffer": "^3.5"
     }
 }