diff --git a/composer.lock b/composer.lock
index 48578f3..d3de1f0 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4072,16 +4072,16 @@
         },
         {
             "name": "symfony/polyfill-mbstring",
-            "version": "v1.5.0",
+            "version": "v1.10.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/polyfill-mbstring.git",
-                "reference": "7c8fae0ac1d216eb54349e6a8baa57d515fe8803"
+                "reference": "c79c051f5b3a46be09205c73b80b346e4153e494"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/polyfill-mbstring/zipball/7c8fae0ac1d216eb54349e6a8baa57d515fe8803",
-                "reference": "7c8fae0ac1d216eb54349e6a8baa57d515fe8803",
+                "url": "https://api.github.com/repos/symfony/polyfill-mbstring/zipball/c79c051f5b3a46be09205c73b80b346e4153e494",
+                "reference": "c79c051f5b3a46be09205c73b80b346e4153e494",
                 "shasum": ""
             },
             "require": {
@@ -4093,7 +4093,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.5-dev"
+                    "dev-master": "1.9-dev"
                 }
             },
             "autoload": {
@@ -4127,7 +4127,7 @@
                 "portable",
                 "shim"
             ],
-            "time": "2017-06-14T15:44:48+00:00"
+            "time": "2018-09-21T13:07:52+00:00"
         },
         {
             "name": "symfony/polyfill-php70",