diff --git a/Resources/rules/german.json b/Resources/rules/german.json
index 6fa2bec..0a8a7d7 100644
--- a/Resources/rules/german.json
+++ b/Resources/rules/german.json
@@ -1,7 +1,7 @@
 {
-    "Ä": "AE",
-    "Ö": "OE",
-    "Ü": "UE",
+    "Ä": "Ae",
+    "Ö": "Oe",
+    "Ü": "Ue",
     "ẞ": "SS",
     "ä": "ae",
     "ö": "oe",
diff --git a/src/RuleProvider/DefaultRuleProvider.php b/src/RuleProvider/DefaultRuleProvider.php
index a0c4bc4..e4a7cd2 100644
--- a/src/RuleProvider/DefaultRuleProvider.php
+++ b/src/RuleProvider/DefaultRuleProvider.php
@@ -9328,9 +9328,9 @@ class DefaultRuleProvider implements RuleProviderInterface
   ),
   'german' => 
   array (
-    'Ä' => 'AE',
-    'Ö' => 'OE',
-    'Ü' => 'UE',
+    'Ä' => 'Ae',
+    'Ö' => 'Oe',
+    'Ü' => 'Ue',
     'ẞ' => 'SS',
     'ä' => 'ae',
     'ö' => 'oe',