diff --git a/Gemfile.lock b/Gemfile.lock
index 172c375e..92c8e32c 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -52,8 +52,8 @@ GEM
       minitest (~> 5.1)
       thread_safe (~> 0.3, >= 0.3.4)
       tzinfo (~> 1.1)
-    addressable (2.5.2)
-      public_suffix (>= 2.0.2, < 4.0)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     afm (0.2.2)
     ansi (1.5.0)
     api-pagination (4.8.1)
@@ -282,7 +282,9 @@ 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 (4.8.0)
     mini_mime (1.0.0)
     mini_portile2 (2.3.0)
@@ -340,7 +342,7 @@ GEM
       prawn (>= 1.3.0, < 3.0.0)
     protected_attributes (1.1.4)
       activemodel (>= 4.0.1, < 5.0)
-    public_suffix (3.0.2)
+    public_suffix (5.0.0)
     puma (3.12.0)
     pundit (2.0.0)
       activesupport (>= 3.0.0)