diff --git a/composer.json b/composer.json
index aed9bfc1..40d8f546 100644
--- a/composer.json
+++ b/composer.json
@@ -1,6 +1,6 @@
 {
 	"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",