diff --git a/Gemfile.lock b/Gemfile.lock
index 0d606c6..b7a4cb7 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -50,8 +50,8 @@ GEM
       i18n (>= 0.7, < 2)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
-    addressable (2.6.0)
-      public_suffix (>= 2.0.2, < 4.0)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     airbrussh (1.3.0)
       sshkit (>= 1.6.1, != 1.7.0)
     american_date (1.1.1)
@@ -189,7 +189,9 @@ 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_mime (1.0.1)
     mini_portile2 (2.4.0)
     minitest (5.11.3)
@@ -208,7 +210,7 @@ GEM
       activerecord (>= 4.2, < 5.3)
       request_store (~> 1.1)
     pg (1.0.0)
-    public_suffix (3.0.3)
+    public_suffix (5.0.0)
     puma (3.11.4)
     pundit (1.1.0)
       activesupport (>= 3.0.0)