diff --git a/Gemfile.lock b/Gemfile.lock
index 1ab30fc..27a8ed5 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -57,8 +57,8 @@ GEM
       i18n (>= 0.7, < 2)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
-    addressable (2.5.2)
-      public_suffix (>= 2.0.2, < 4.0)
+    addressable (2.8.0)
+      public_suffix (>= 2.0.2, < 5.0)
     airbrussh (1.3.0)
       sshkit (>= 1.6.1, != 1.7.0)
     arel (9.0.0)
@@ -110,7 +110,9 @@ GEM
     marcel (0.3.3)
       mimemagic (~> 0.3.2)
     method_source (0.9.0)
-    mimemagic (0.3.2)
+    mimemagic (0.3.10)
+      nokogiri (~> 1)
+      rake
     mini_mime (1.0.1)
     mini_portile2 (2.3.0)
     minitest (5.11.3)
@@ -122,7 +124,7 @@ GEM
     nokogiri (1.8.5)
       mini_portile2 (~> 2.3.0)
     pg (1.1.3)
-    public_suffix (3.0.3)
+    public_suffix (4.0.6)
     puma (3.12.0)
     pundit (2.0.0)
       activesupport (>= 3.0.0)