diff --git a/Gemfile.lock b/Gemfile.lock
index 421a0b6..bd93802 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -48,7 +48,7 @@ GEM
     pathutil (0.16.1)
       forwardable-extended (~> 2.6)
     public_suffix (3.0.2)
-    rack (1.6.9)
+    rack (1.6.13)
     rack-protection (1.5.5)
       rack
     rack-test (0.8.3)