diff --git a/Gemfile.lock b/Gemfile.lock
index 35ccee5..9191998 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -44,8 +44,8 @@ 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)
     archive-zip (0.12.0)
       io-like (~> 0.3.0)
@@ -124,7 +124,9 @@ GEM
     mime-types (3.2.2)
       mime-types-data (~> 3.2015)
     mime-types-data (3.2018.0812)
-    mimemagic (0.3.3)
+    mimemagic (0.3.10)
+      nokogiri (~> 1)
+      rake
     mini_mime (1.0.1)
     mini_portile2 (2.4.0)
     minitest (5.11.3)
@@ -143,7 +145,7 @@ GEM
       multi_xml (~> 0.5)
       rack (>= 1.2, < 3)
     pg (1.1.4)
-    public_suffix (3.0.3)
+    public_suffix (4.0.7)
     puma (3.12.1)
     rack (2.0.7)
     rack-cas (0.16.1)