diff --git a/composer.lock b/composer.lock
index e95408ae23..8694dc4cbe 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4258,7 +4258,8 @@
     "aliases": [],
     "minimum-stability": "dev",
     "stability-flags": {
-        "behat/mink": 20
+        "behat/mink": 20,
+        "symfony/phpunit-bridge": 10
     },
     "prefer-stable": true,
     "prefer-lowest": false,
diff --git a/core/composer.json b/core/composer.json
index 9ef6809ff7..48e6619880 100644
--- a/core/composer.json
+++ b/core/composer.json
@@ -47,7 +47,7 @@
         "phpunit/phpunit": ">=4.8.35 <5",
         "phpspec/prophecy": "^1.4",
         "symfony/css-selector": "~3.2.8",
-        "symfony/phpunit-bridge": "^3.4.0-BETA2"
+        "symfony/phpunit-bridge": "^3.4.0@beta"
     },
     "replace": {
         "drupal/action": "self.version",