diff --git a/Gemfile.lock b/Gemfile.lock
index 3911a01..887587c 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -115,7 +115,7 @@ GEM
     pry-theme (1.1.3)
       coderay (~> 1.1)
       json (~> 1.8)
-    rack (1.6.4)
+    rack (1.6.12)
     rack-protection (1.5.3)
       rack
     rainbow (2.0.0)