diff --git a/Gemfile.lock b/Gemfile.lock
index dc84be3..4d276ba 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -179,7 +179,7 @@ GEM
     pry (0.12.2)
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
-    rack (1.6.11)
+    rack (1.6.13)
     rack-protection (1.5.5)
       rack
     rack-test (0.6.3)