diff --git a/Gemfile.lock b/Gemfile.lock
index ece6bbf..730d0ea 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -197,7 +197,7 @@ GEM
     puma (3.4.0)
     rabl (0.11.8)
       activesupport (>= 2.3.14)
-    rack (1.6.4)
+    rack (1.6.13)
     rack-ssl (1.0.0)
       rack
     rack-test (0.6.3)