diff --git a/phpcs-simplesamlphp.xml b/phpcs-simplesamlphp.xml
index ffd9468..544b410 100644
--- a/phpcs-simplesamlphp.xml
+++ b/phpcs-simplesamlphp.xml
@@ -13,4 +13,6 @@
   <!-- Do not allow any unused use-statements to exist -->
   <rule ref="SlevomatCodingStandard.Namespaces.UnusedUses" />
 
+  <!-- Enforce alphabetically sorted use-statements -->
+  <rule ref="SlevomatCodingStandard.Namespaces.AlphabeticallySortedUses" />
 </ruleset>