diff --git a/Gemfile.lock b/Gemfile.lock
index 31e9aca1b..d86a06e19 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -86,7 +86,8 @@ GEM
       i18n (~> 0.7)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
-    addressable (2.4.0)
+    addressable (2.8.0)
+      public_suffix (>= 2.0.2, < 5.0)
     ancestry (2.1.0)
       activerecord (>= 3.0.0)
     ansi (1.5.0)
@@ -190,7 +191,9 @@ GEM
     mime-types (3.1)
       mime-types-data (~> 3.2015)
     mime-types-data (3.2016.0521)
-    mimemagic (0.3.2)
+    mimemagic (0.4.3)
+      nokogiri (~> 1)
+      rake
     mini_magick (4.5.1)
     mini_portile2 (2.1.0)
     minitest (5.9.0)
@@ -216,6 +219,7 @@ GEM
       coderay (~> 1.1.0)
       method_source (~> 0.8.1)
       slop (~> 3.4)
+    public_suffix (4.0.6)
     rack (2.0.1)
     rack-rewrite (1.5.1)
     rack-test (0.6.3)