diff --git a/gateway/acceptance-tests/Gemfile.lock b/gateway/acceptance-tests/Gemfile.lock
index 4ad04da..1d83492 100644
--- a/gateway/acceptance-tests/Gemfile.lock
+++ b/gateway/acceptance-tests/Gemfile.lock
@@ -43,7 +43,7 @@ GEM
       coderay (~> 1.0)
       method_source (~> 0.8)
       slop (~> 3.4)
-    rack (1.5.2)
+    rack (1.6.13)
     rack-test (0.6.2)
       rack (>= 1.0)
     rest-client (1.6.7)