diff --git a/deck_endpoints.py b/deck_endpoints.py
index 9efb262..313c6c0 100644
--- a/deck_endpoints.py
+++ b/deck_endpoints.py
@@ -217,6 +217,41 @@ def delete_deck(deckname):
         logger.error(f"Datenbankfehler beim Löschen des Decks '{deckname}': {e}")
         return jsonify({'error': 'Database error', 'details': str(e)}), 500
 
+
+@deck_bp.route('/api/decks/<old_deckname>/rename', methods=['PUT'])
+def rename_deck(old_deckname):
+    conn = get_db_connection()
+    cursor = conn.cursor()
+    try:
+        # Überprüfen, ob das Deck existiert
+        cursor.execute('SELECT COUNT(*) as count FROM Deck WHERE deckname = ?', (old_deckname,))
+        result = cursor.fetchone()
+        if result['count'] == 0:
+            conn.close()
+            return jsonify({'error': 'Deck not found'}), 404
+
+        # Neuen Decknamen aus dem Request-Body holen
+        new_deckname = request.json.get('newDeckName')
+        if not new_deckname:
+            conn.close()
+            return jsonify({'error': 'New deck name is required'}), 400
+
+        # Überprüfen, ob der neue Deckname bereits existiert
+        cursor.execute('SELECT COUNT(*) as count FROM Deck WHERE deckname = ?', (new_deckname,))
+        result = cursor.fetchone()
+        if result['count'] > 0:
+            conn.close()
+            return jsonify({'error': 'Deck with the new name already exists'}), 409
+
+        # Deck umbenennen
+        cursor.execute('UPDATE Deck SET deckname = ? WHERE deckname = ?', (new_deckname, old_deckname))
+        conn.commit()
+        conn.close()
+        return jsonify({'status': 'success', 'message': 'Deck renamed successfully'}), 200
+    except sqlite3.Error as e:
+        conn.close()
+        logger.error(f"Datenbankfehler beim Umbenennen des Decks '{old_deckname}': {e}")
+        return jsonify({'error': 'Database error', 'details': str(e)}), 500
 # ------
 # Image - POST, GET, DELETE
 # ------