diff --git a/composer.json b/composer.json
index 6f3fca67b..2ec52551c 100644
--- a/composer.json
+++ b/composer.json
@@ -40,7 +40,7 @@
         "symfony/console": "2.8.38"
     },
     "require-dev": {
-        "symfony/phpunit-bridge": "^4.2",
+        "symfony/phpunit-bridge": "^3.4",
         "phpspec/prophecy": "^1.10"
     },
     "suggest": {
diff --git a/composer.lock b/composer.lock
index 125842443..747a5fce4 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "c6641e77cf04ea9862bb529cf07b79e0",
+    "content-hash": "cc6f9640996dfad00a5b03a8be01a571",
     "packages": [
         {
             "name": "composer/ca-bundle",
@@ -1238,16 +1238,16 @@
         },
         {
             "name": "symfony/phpunit-bridge",
-            "version": "v4.2.12",
+            "version": "v3.4.37",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/phpunit-bridge.git",
-                "reference": "80f9ffa6afcc27c7b00e8b8446b1d5d48d94bae7"
+                "reference": "ebfd1b428ffc14306e843092763f228bfba168d0"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/phpunit-bridge/zipball/80f9ffa6afcc27c7b00e8b8446b1d5d48d94bae7",
-                "reference": "80f9ffa6afcc27c7b00e8b8446b1d5d48d94bae7",
+                "url": "https://api.github.com/repos/symfony/phpunit-bridge/zipball/ebfd1b428ffc14306e843092763f228bfba168d0",
+                "reference": "ebfd1b428ffc14306e843092763f228bfba168d0",
                 "shasum": ""
             },
             "require": {
@@ -1265,7 +1265,7 @@
             "type": "symfony-bridge",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "4.2-dev"
+                    "dev-master": "3.4-dev"
                 },
                 "thanks": {
                     "name": "phpunit/phpunit",
@@ -1299,7 +1299,7 @@
             ],
             "description": "Symfony PHPUnit Bridge",
             "homepage": "https://symfony.com",
-            "time": "2019-07-05T06:33:37+00:00"
+            "time": "2020-01-14T14:27:59+00:00"
         }
     ],
     "aliases": [],