diff --git a/composer.lock b/composer.lock
index 3b8d7122..f1a95b6c 100644
--- a/composer.lock
+++ b/composer.lock
@@ -440,16 +440,16 @@
         },
         {
             "name": "symfony/event-dispatcher",
-            "version": "v3.4.44",
+            "version": "v3.4.47",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/event-dispatcher.git",
-                "reference": "a0f6858fbf7a524747e87a4c336cab7d0b67c802"
+                "reference": "31fde73757b6bad247c54597beef974919ec6860"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/event-dispatcher/zipball/a0f6858fbf7a524747e87a4c336cab7d0b67c802",
-                "reference": "a0f6858fbf7a524747e87a4c336cab7d0b67c802",
+                "url": "https://api.github.com/repos/symfony/event-dispatcher/zipball/31fde73757b6bad247c54597beef974919ec6860",
+                "reference": "31fde73757b6bad247c54597beef974919ec6860",
                 "shasum": ""
             },
             "require": {
@@ -461,6 +461,7 @@
             "require-dev": {
                 "psr/log": "~1.0",
                 "symfony/config": "~2.8|~3.0|~4.0",
+                "symfony/debug": "~3.4|~4.4",
                 "symfony/dependency-injection": "~3.3|~4.0",
                 "symfony/expression-language": "~2.8|~3.0|~4.0",
                 "symfony/stopwatch": "~2.8|~3.0|~4.0"
@@ -470,11 +471,6 @@
                 "symfony/http-kernel": ""
             },
             "type": "library",
-            "extra": {
-                "branch-alias": {
-                    "dev-master": "3.4-dev"
-                }
-            },
             "autoload": {
                 "psr-4": {
                     "Symfony\\Component\\EventDispatcher\\": ""
@@ -513,7 +509,7 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2020-08-12T14:55:37+00:00"
+            "time": "2020-10-24T10:57:07+00:00"
         },
         {
             "name": "symfony/filesystem",