diff --git a/.travis.yml b/.travis.yml
index dfc4bde5..2dea508d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -39,7 +39,7 @@ install:
   # @see https://github.com/jhedstrom/drupalextension/issues/413
   # @todo Re-enable behat drush endpoint testing.
   # @see https://github.com/jhedstrom/drupalextension/issues/458
-  - test ${DRUPAL_VERSION} -ne 8 || composer require --prefer-source drush/drush:~9.0 symfony/dependency-injection:3.2.8
+  - test ${DRUPAL_VERSION} -ne 8 || composer require --prefer-source drush/drush:~9.0 symfony/dependency-injection:3.4.4
   - composer install
   # Install drush globally.
   - (test ${DRUPAL_VERSION} -ne 8 && composer global require drush/drush:~8.0) || composer global require drush/drush:~9.0
diff --git a/composer.json b/composer.json
index 51ac4210..8a230ff2 100644
--- a/composer.json
+++ b/composer.json
@@ -28,8 +28,8 @@
     "behat/mink-goutte-driver": "~1.0",
     "behat/mink-selenium2-driver": "~1.1",
     "drupal/drupal-driver": "^1.3.2",
-    "symfony/dependency-injection": "~2.7|~3.0",
-    "symfony/event-dispatcher": "~2.7|~3.0"
+    "symfony/dependency-injection": "~3.0",
+    "symfony/event-dispatcher": "~3.0"
   },
   "require-dev": {
     "phpspec/phpspec": "~2.0",