diff --git a/databrowser/Gemfile.lock b/databrowser/Gemfile.lock
index 750f37d..435c47f 100644
--- a/databrowser/Gemfile.lock
+++ b/databrowser/Gemfile.lock
@@ -103,7 +103,7 @@ GEM
       multi_json (~> 1.0)
       rack (~> 1.2)
     polyglot (0.3.3)
-    rack (1.4.1)
+    rack (1.4.7)
     rack-cache (1.2)
       rack (>= 0.4)
     rack-ssl (1.3.2)