diff --git a/src/Behat/MinkExtension/Extension.php b/src/Behat/MinkExtension/Extension.php
index fa043fc..e6b7f47 100644
--- a/src/Behat/MinkExtension/Extension.php
+++ b/src/Behat/MinkExtension/Extension.php
@@ -210,13 +210,13 @@ class Extension implements ExtensionInterface
                                     defaultValue('firefox')->
                                 end()->
                                 scalarNode('version')->
-                                    defaultValue(8)->
+                                    defaultValue("9")->
                                 end()->
                                 scalarNode('platform')->
                                     defaultValue('ANY')->
                                 end()->
                                 scalarNode('browserVersion')->
-                                    defaultValue(8)->
+                                    defaultValue("9")->
                                 end()->
                                 scalarNode('browser')->
                                     defaultValue('firefox')->