diff --git a/composer.json b/composer.json
index 3a82c6f0..39741164 100644
--- a/composer.json
+++ b/composer.json
@@ -4,7 +4,7 @@
 		"jakobo/hotp-php": "2.0.0"
 	},
 	"require-dev": {
-		"mediawiki/mediawiki-codesniffer": "37.0.0",
+		"mediawiki/mediawiki-codesniffer": "38.0.0",
 		"mediawiki/mediawiki-phan-config": "0.11.0",
 		"mediawiki/minus-x": "1.1.1",
 		"php-parallel-lint/php-console-highlighter": "0.5.0",
diff --git a/src/IModule.php b/src/IModule.php
index 80407358..f931bbd6 100644
--- a/src/IModule.php
+++ b/src/IModule.php
@@ -42,7 +42,7 @@ interface IModule {
 	 * but it might not be true for all future modules
 	 *
 	 * @param OATHUser $user
-	 * @return boolean
+	 * @return bool
 	 */
 	public function isEnabled( OATHUser $user );
 
@@ -51,7 +51,7 @@ interface IModule {
 	 *
 	 * @param OATHUser $user
 	 * @param array $data
-	 * @return boolean
+	 * @return bool
 	 */
 	public function verify( OATHUser $user, array $data );