diff --git a/Gemfile.lock b/Gemfile.lock
index 0e1d951d..ba3f99fc 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -135,7 +135,9 @@ GEM
     mime-types (3.1)
       mime-types-data (~> 3.2015)
     mime-types-data (3.2016.0521)
-    mimemagic (0.3.1)
+    mimemagic (0.3.10)
+      nokogiri (~> 1)
+      rake
     mini_portile2 (2.0.0)
     minitest (5.9.0)
     multi_json (1.12.1)
@@ -171,7 +173,7 @@ GEM
     private_pub (1.0.3)
       faye
     public_suffix (2.0.5)
-    rack (1.6.4)
+    rack (1.6.13)
     rack-test (0.6.3)
       rack (>= 1.0)
     rails (4.2.6)