diff --git a/Gemfile.lock b/Gemfile.lock
index aed2575..9323284 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -121,7 +121,9 @@ GEM
     mime-types (3.1)
       mime-types-data (~> 3.2015)
     mime-types-data (3.2016.0521)
-    mimemagic (0.3.2)
+    mimemagic (0.3.10)
+      nokogiri (~> 1)
+      rake
     mini_portile2 (2.2.0)
     minitest (5.10.2)
     multi_json (1.12.1)
@@ -140,7 +142,7 @@ GEM
       mimemagic (~> 0.3.0)
       terrapin (~> 0.6.0)
     pg (0.21.0)
-    rack (1.6.8)
+    rack (1.6.13)
     rack-test (0.6.3)
       rack (>= 1.0)
     rails (4.2.6)