diff --git a/Gemfile.lock b/Gemfile.lock
index 854e2b3..2e55d02 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -38,8 +38,8 @@ 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)
     ancestry (3.0.1)
       activerecord (>= 3.2.0)
     ansi (1.5.0)
@@ -144,7 +144,9 @@ GEM
     mime-types (3.2.2)
       mime-types-data (~> 3.2015)
     mime-types-data (3.2018.0812)
-    mimemagic (0.3.2)
+    mimemagic (0.3.10)
+      nokogiri (~> 1)
+      rake
     mini_mime (1.0.1)
     mini_portile2 (2.4.0)
     minitest (5.11.3)
@@ -190,7 +192,7 @@ GEM
     pg (0.21.0)
     pg (0.21.0-x64-mingw32)
     pg (0.21.0-x86-mingw32)
-    public_suffix (3.0.2)
+    public_suffix (4.0.7)
     puma (3.12.4)
     puma (3.12.4-java)
     rack (2.0.8)