diff --git a/Gemfile.lock b/Gemfile.lock
index 5f1214a..73541be 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -94,7 +94,7 @@ GEM
       ast (~> 2.2)
     powerpack (0.1.1)
     puma (3.1.0)
-    rack (1.6.4)
+    rack (1.6.13)
     rack-accept (0.4.5)
       rack (>= 0.4)
     rack-cors (0.4.0)