diff --git a/flowt/Gemfile.lock b/flowt/Gemfile.lock
index ebbeea7..5cc4152 100644
--- a/flowt/Gemfile.lock
+++ b/flowt/Gemfile.lock
@@ -108,7 +108,7 @@ GEM
     multi_xml (0.5.1)
     pg (0.14.1)
     polyglot (0.3.3)
-    rack (1.4.1)
+    rack (1.4.7)
     rack-cache (1.2)
       rack (>= 0.4)
     rack-ssl (1.3.2)