diff --git a/apps/rails/Gemfile.lock b/apps/rails/Gemfile.lock
index 7f32252..e391d5c 100644
--- a/apps/rails/Gemfile.lock
+++ b/apps/rails/Gemfile.lock
@@ -58,7 +58,7 @@ GEM
     nio4r (1.2.1)
     nokogiri (1.6.8.1)
       mini_portile2 (~> 2.1.0)
-    rack (2.0.1)
+    rack (2.2.6.4)
     rack-test (0.6.3)
       rack (>= 1.0)
     rails (5.0.0.1)