diff --git a/composer.json b/composer.json
index dccb639..0371f61 100644
--- a/composer.json
+++ b/composer.json
@@ -24,7 +24,7 @@
 		"behat/mink-extension": "~1.3.0",
 		"behat/mink-selenium2-driver": "~1.2.0",
 		"symfony/dom-crawler": "~2.0",
-		"silverstripe/testsession": "^2.0.0-alpha2",
+		"silverstripe/testsession": "2.0.0-alpha6",
 		"silverstripe/framework": "^4.0.0@dev"
 	},