diff --git a/.phpcs.xml b/.phpcs.xml
index 74d88f6d..eddb6dc8 100644
--- a/.phpcs.xml
+++ b/.phpcs.xml
@@ -1,8 +1,6 @@
 <?xml version="1.0"?>
 <ruleset>
-	<rule ref="./vendor/mediawiki/mediawiki-codesniffer/MediaWiki">
-		<exclude name="MediaWiki.Usage.ExtendClassUsage.FunctionConfigUsage" />
-	</rule>
+	<rule ref="./vendor/mediawiki/mediawiki-codesniffer/MediaWiki" />
 	<file>.</file>
 	<arg name="extensions" value="php" />
 	<arg name="encoding" value="UTF-8" />
diff --git a/composer.json b/composer.json
index 9811f68f..09b55709 100644
--- a/composer.json
+++ b/composer.json
@@ -1,6 +1,6 @@
 {
 	"require-dev": {
-		"mediawiki/mediawiki-codesniffer": "39.0.0",
+		"mediawiki/mediawiki-codesniffer": "40.0.1",
 		"mediawiki/mediawiki-phan-config": "0.12.0",
 		"mediawiki/minus-x": "1.1.1",
 		"php-parallel-lint/php-console-highlighter": "1.0.0",