diff --git a/Gemfile.lock b/Gemfile.lock
index c696fa4..8fb52ed 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -53,8 +53,8 @@ GEM
       activerecord (>= 4.2.8)
     acts_as_list (0.9.9)
       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)
     airbrussh (1.3.0)
       sshkit (>= 1.6.1, != 1.7.0)
     annotate (2.7.2)
@@ -266,7 +266,7 @@ GEM
     polyamorous (1.3.1)
       activerecord (>= 3.0)
     powerpack (0.1.1)
-    public_suffix (3.0.1)
+    public_suffix (5.0.0)
     rack (2.0.3)
     rack-cors (1.0.2)
     rack-protection (2.0.0)