diff --git a/composer.lock b/composer.lock
index ecc12a1bc7eb..43cf378c13f8 100644
--- a/composer.lock
+++ b/composer.lock
@@ -2974,16 +2974,16 @@
         },
         {
             "name": "symfony/routing",
-            "version": "v3.4.20",
+            "version": "v3.4.21",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/routing.git",
-                "reference": "94a3dd89bda078bef0c3bf79eb024fe136dd58f9"
+                "reference": "445d3629a26930158347a50d1a5f2456c49e0ae6"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/routing/zipball/94a3dd89bda078bef0c3bf79eb024fe136dd58f9",
-                "reference": "94a3dd89bda078bef0c3bf79eb024fe136dd58f9",
+                "url": "https://api.github.com/repos/symfony/routing/zipball/445d3629a26930158347a50d1a5f2456c49e0ae6",
+                "reference": "445d3629a26930158347a50d1a5f2456c49e0ae6",
                 "shasum": ""
             },
             "require": {
@@ -3047,7 +3047,7 @@
                 "uri",
                 "url"
             ],
-            "time": "2018-12-03T13:20:34+00:00"
+            "time": "2019-01-01T13:45:19+00:00"
         },
         {
             "name": "symfony/translation",