diff --git a/Gemfile.lock b/Gemfile.lock
index 9a874a4..8402bd1 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -141,7 +141,7 @@ GEM
     pry (0.12.2)
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
-    rack (1.6.11)
+    rack (1.6.12)
     rack-test (0.6.3)
       rack (>= 1.0)
     rails (4.2.11)