diff --git a/Gemfile.lock b/Gemfile.lock
index d6a15e2..04b789f 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -47,8 +47,8 @@ GEM
       i18n (~> 0.7)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
-    addressable (2.5.0)
-      public_suffix (~> 2.0, >= 2.0.2)
+    addressable (2.8.0)
+      public_suffix (>= 2.0.2, < 5.0)
     arel (7.1.4)
     autoprefixer-rails (6.5.3)
       execjs
@@ -224,7 +224,9 @@ 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 (2.1.0)
     minitest (5.10.1)
     momentjs-rails (2.15.1)
@@ -283,7 +285,7 @@ GEM
       slop (~> 3.4)
     pry-rails (0.3.4)
       pry (>= 0.9.10)
-    public_suffix (2.0.4)
+    public_suffix (4.0.6)
     puma (3.6.0)
     rack (2.0.1)
     rack-test (0.6.3)