diff --git a/composer.json b/composer.json
index 4d4f79137d..19cca89bab 100644
--- a/composer.json
+++ b/composer.json
@@ -2,7 +2,7 @@
 	"require-dev": {
 		"jakub-onderka/php-parallel-lint": "1.0.0",
 		"jakub-onderka/php-console-highlighter": "0.4.0",
-		"mediawiki/mediawiki-codesniffer": "29.0.0",
+		"mediawiki/mediawiki-codesniffer": "30.0.0",
 		"mediawiki/minus-x": "1.0.0",
 		"mediawiki/mediawiki-phan-config": "0.9.1"
 	},