diff --git a/Gemfile.lock b/Gemfile.lock
index 974245455..cb5c13fc5 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -69,8 +69,8 @@ GEM
       i18n (>= 0.7, < 2)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
-    addressable (2.5.2)
-      public_suffix (>= 2.0.2, < 4.0)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     ambry (1.0.0)
     arbre (1.1.1)
       activesupport (>= 3.0.0)
@@ -495,7 +495,9 @@ GEM
     mime-types (3.1)
       mime-types-data (~> 3.2015)
     mime-types-data (3.2016.0521)
-    mimemagic (0.3.3)
+    mimemagic (0.3.10)
+      nokogiri (~> 1)
+      rake
     mini_magick (4.8.0)
     mini_mime (1.0.1)
     mini_portile2 (2.4.0)
@@ -545,7 +547,7 @@ GEM
     pry (0.11.3)
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
-    public_suffix (3.0.2)
+    public_suffix (5.0.0)
     puma (3.11.4)
     puma_worker_killer (0.1.0)
       get_process_mem (~> 0.2)