diff --git a/Gemfile.lock b/Gemfile.lock
index 42ddd0e..ab3a930 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -49,8 +49,8 @@ GEM
       tzinfo (~> 1.1)
     acts_as_list (0.9.15)
       activerecord (>= 3.0)
-    addressable (2.5.2)
-      public_suffix (>= 2.0.2, < 4.0)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     arel (9.0.0)
     bcrypt (3.1.12)
     bootsnap (1.3.0)
@@ -100,7 +100,9 @@ GEM
     marcel (0.3.2)
       mimemagic (~> 0.3.2)
     method_source (0.9.0)
-    mimemagic (0.3.2)
+    mimemagic (0.3.10)
+      nokogiri (~> 1)
+      rake
     mini_mime (1.0.0)
     mini_portile2 (2.3.0)
     minitest (5.11.3)
@@ -116,7 +118,7 @@ GEM
       rails (>= 4.0)
     orm_adapter (0.5.0)
     pg (1.0.0)
-    public_suffix (3.0.2)
+    public_suffix (4.0.7)
     puma (3.11.4)
     rack (2.0.5)
     rack-cors (1.0.2)