diff --git a/composer.json b/composer.json
index 13d210a..c1d9fb4 100644
--- a/composer.json
+++ b/composer.json
@@ -3,7 +3,7 @@
 		"php": ">=5.5.9"
 	},
 	"require-dev": {
-		"mediawiki/mediawiki-codesniffer": "33.0.0",
+		"mediawiki/mediawiki-codesniffer": "34.0.0",
 		"mediawiki/mediawiki-phan-config": "0.10.4",
 		"mediawiki/minus-x": "1.1.0",
 		"php-parallel-lint/php-console-highlighter": "0.5.0",