diff --git a/Gemfile.lock b/Gemfile.lock
index 0d33e07..d2e891d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -56,8 +56,8 @@ GEM
     acts-as-taggable-on (5.0.0)
       activerecord (>= 4.2.8)
     acts_as_votable (0.12.1)
-    addressable (2.6.0)
-      public_suffix (>= 2.0.2, < 4.0)
+    addressable (2.8.4)
+      public_suffix (>= 2.0.2, < 6.0)
     arbre (1.1.1)
       activesupport (>= 3.0.0)
     arel (6.0.4)
@@ -297,7 +297,7 @@ GEM
     power_assert (1.1.4)
     protected_attributes (1.1.4)
       activemodel (>= 4.0.1, < 5.0)
-    public_suffix (3.0.3)
+    public_suffix (5.0.1)
     raabro (1.1.6)
     rack (1.6.13)
     rack-accept (0.4.5)