diff --git a/Gemfile.lock b/Gemfile.lock
index c8605e4..669aaa7 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -46,8 +46,8 @@ 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)
     airbrussh (1.3.2)
       sshkit (>= 1.6.1, != 1.7.0)
     api-pagination (4.8.2)
@@ -186,7 +186,9 @@ GEM
     mime-types (3.2.2)
       mime-types-data (~> 3.2015)
     mime-types-data (3.2019.0331)
-    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)
@@ -212,7 +214,7 @@ GEM
     postmark-rails (0.19.0)
       actionmailer (>= 3.0.0)
       postmark (~> 1.15.0)
-    public_suffix (3.1.0)
+    public_suffix (5.0.0)
     puma (3.12.1)
     raabro (1.1.6)
     rack (2.0.7)