diff --git a/Gemfile.lock b/Gemfile.lock
index b0e4f0dd..f7060c11 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -60,8 +60,8 @@ 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)
     aes_key_wrap (1.0.1)
     airbrake (5.8.1)
       airbrake-ruby (~> 1.8)
@@ -180,7 +180,9 @@ GEM
       rack-contrib (>= 1.1, < 3)
       railties (>= 3.0.0, < 6)
     method_source (0.9.2)
-    mimemagic (0.3.3)
+    mimemagic (0.3.10)
+      nokogiri (~> 1)
+      rake
     mina (1.2.3)
       open4 (~> 1.3.4)
       rake
@@ -231,7 +233,7 @@ GEM
     pry (0.12.2)
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
-    public_suffix (3.0.3)
+    public_suffix (4.0.7)
     puma (3.12.0)
     pundit (2.0.1)
       activesupport (>= 3.0.0)