diff --git a/src/Serializer.php b/src/Serializer.php
index 34386e3..df9773b 100644
--- a/src/Serializer.php
+++ b/src/Serializer.php
@@ -67,7 +67,7 @@ private static function encodeArray(array $data, $indent) {
                 $result = $result . $subIndent . $entry;
             }
         }
-        $result = $result . $indent . '}';
+        $result = rtrim($result, ",\n") . "\n" . $indent . '}';
         return $result;
     }
 
@@ -118,4 +118,4 @@ private static function encodeBoolean($data) {
     private static function encodeNull() {
         return 'nil';
     }
-}
\ No newline at end of file
+}