diff --git a/Gemfile.lock b/Gemfile.lock
index cc3a224..1458fbf 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -216,7 +216,7 @@ GEM
       activesupport (>= 3.0.0)
     racc (1.5.2)
     racc (1.5.2-java)
-    rack (2.2.3)
+    rack (2.2.6.3)
     rack-pjax (1.1.0)
       nokogiri (~> 1.5)
       rack (>= 1.1)