diff --git a/composer.lock b/composer.lock
index de00789..f309008 100644
--- a/composer.lock
+++ b/composer.lock
@@ -449,7 +449,7 @@
     "packages-dev": [
         {
             "name": "symfony/polyfill-mbstring",
-            "version": "v1.1.0",
+            "version": "v1.1.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/polyfill-mbstring.git",