diff --git a/Gemfile.lock b/Gemfile.lock
index 4bf3451..0d6c886 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,5 +1,5 @@
 GEM
-  remote: http://rubygems.org/
+  remote: https://rubygems.org/
   specs:
     addressable (2.2.8)
     bcrypt-ruby (3.0.1)
@@ -66,7 +66,7 @@ GEM
     json_pure (1.7.4)
     multi_json (1.3.6)
     nokogiri (1.5.5)
-    rack (1.4.1)
+    rack (1.6.13)
     rack-protection (1.2.0)
       rack
     rack-test (0.6.1)