diff --git a/Gemfile.lock b/Gemfile.lock
index bad9c85ef2e..659c989647a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -101,7 +101,7 @@ GEM
     padrino-support (0.12.5)
       activesupport (>= 3.1)
     puma (3.4.0)
-    rack (1.6.4)
+    rack (1.6.13)
     rack-test (0.6.3)
       rack (>= 1.0)
     rake (10.4.2)