diff --git a/gb/Gemfile.lock b/gb/Gemfile.lock
index fb6eabb..5f47961 100644
--- a/gb/Gemfile.lock
+++ b/gb/Gemfile.lock
@@ -85,7 +85,7 @@ GEM
       mini_portile2 (~> 2.4.0)
     orm_adapter (0.5.0)
     pg (0.21.0)
-    rack (1.6.11)
+    rack (1.6.13)
     rack-test (0.6.3)
       rack (>= 1.0)
     rails (4.2.7)