diff --git a/Gemfile.lock b/Gemfile.lock
index 7160e36bf..91622d49e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -36,7 +36,8 @@ GEM
     activesupport (3.2.21)
       i18n (~> 0.6, >= 0.6.4)
       multi_json (~> 1.0)
-    addressable (2.3.6)
+    addressable (2.8.0)
+      public_suffix (>= 2.0.2, < 5.0)
     arel (3.0.3)
     bson (1.11.1)
     bson_ext (1.11.1)
@@ -62,10 +63,10 @@ GEM
     cocaine (0.5.4)
       climate_control (>= 0.0.3, < 1.0)
     columnize (0.8.9)
-    dragonfly (1.0.7)
+    dragonfly (1.4.0)
       addressable (~> 2.3)
       multi_json (~> 1.0)
-      rack
+      rack (>= 1.3)
     erubis (2.7.0)
     hike (1.2.3)
     i18n (0.6.11)
@@ -91,7 +92,7 @@ GEM
     mongoid-paperclip (0.0.9)
       paperclip (>= 2.3.6)
     moped (1.5.2)
-    multi_json (1.10.1)
+    multi_json (1.15.0)
     mynyml-redgreen (0.7.1)
       term-ansicolor (>= 1.0.4)
     nokogiri (1.6.5)
@@ -104,7 +105,8 @@ GEM
       cocaine (~> 0.5.3)
       mime-types
     polyglot (0.3.5)
-    rack (1.4.5)
+    public_suffix (4.0.7)
+    rack (1.4.7)
     rack-cache (1.2)
       rack (>= 0.4)
     rack-ssl (1.3.4)