diff --git a/src/Query/Builder.php b/src/Query/Builder.php
index da08163883..e6c1511e83 100644
--- a/src/Query/Builder.php
+++ b/src/Query/Builder.php
@@ -805,7 +805,7 @@ protected function filterTestLike($item, $like)
 
         $pattern = Pattern::sqlLikeToRegex($like);
 
-        return preg_match('/'.$pattern.'/im', (string) $item);
+        return preg_match('/'.$pattern.'/imu', (string) $item);
     }
 
     protected function filterTestNotLike($item, $like)
@@ -815,7 +815,7 @@ protected function filterTestNotLike($item, $like)
 
     protected function filterTestLikeRegex($item, $pattern)
     {
-        return preg_match("/{$pattern}/im", (string) $item);
+        return preg_match("/{$pattern}/imu", (string) $item);
     }
 
     protected function filterTestNotLikeRegex($item, $pattern)
diff --git a/src/Query/EloquentQueryBuilder.php b/src/Query/EloquentQueryBuilder.php
index 617d74b452..a4bc452a23 100644
--- a/src/Query/EloquentQueryBuilder.php
+++ b/src/Query/EloquentQueryBuilder.php
@@ -175,7 +175,7 @@ public function where($column, $operator = null, $value = null, $boolean = 'and'
 
         if ($operator !== null && strtolower($operator) == 'like') {
             $grammar = $this->builder->getConnection()->getQueryGrammar();
-            $this->builder->whereRaw('LOWER('.$grammar->wrap($this->column($column)).') LIKE ?', strtolower($value), $boolean);
+            $this->builder->whereRaw('LOWER('.$grammar->wrap($this->column($column)).') LIKE ?', mb_strtolower($value), $boolean);
 
             return $this;
         }
diff --git a/tests/Data/Entries/EntryQueryBuilderTest.php b/tests/Data/Entries/EntryQueryBuilderTest.php
index dcb83ee36d..67f7168413 100644
--- a/tests/Data/Entries/EntryQueryBuilderTest.php
+++ b/tests/Data/Entries/EntryQueryBuilderTest.php
@@ -967,6 +967,9 @@ public function entries_are_found_using_like($like, $expected)
             '/ test',
             'test /',
             'test / test',
+            'Über dem Meer',
+            'über dem meer',
+            'Ärger',
         ])->each(function ($val, $i) {
             EntryFactory::id($i)
                 ->slug('post-'.$i)
@@ -999,6 +1002,10 @@ public static function likeProvider()
             '%/' => ['/', 'test /'],
             '/%' => ['/', '/ test'],
             '%/%' => ['/', '/ test', 'test /', 'test / test'],
+            '%über%' => ['Über dem Meer', 'über dem meer'],
+            '%Über%' => ['Über dem Meer', 'über dem meer'],
+            '%ärger%' => ['Ärger'],
+            '%Ärger%' => ['Ärger'],
         ])->mapWithKeys(function ($expected, $like) {
             return [$like => [$like, $expected]];
         });