diff --git a/Gemfile.lock b/Gemfile.lock
index 995c79d1b..5da89eb0d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -79,7 +79,7 @@ GEM
     nokogiri (1.7.2)
       mini_portile2 (~> 2.1.0)
     oauth (0.4.7)
-    rack (1.6.8)
+    rack (1.6.13)
     rack-test (0.6.3)
       rack (>= 1.0)
     rails (4.2.8)