diff --git a/Gemfile.lock b/Gemfile.lock
index a6cf1bb..bc26029 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -152,7 +152,7 @@ GEM
     psych (5.1.2)
       stringio
     racc (1.8.1)
-    rack (3.0.11)
+    rack (3.0.16)
     rack-session (2.0.0)
       rack (>= 3.0.0)
     rack-test (2.1.0)