diff --git a/Gemfile.lock b/Gemfile.lock
index 0c65d95..e3a70e0 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -42,8 +42,8 @@ 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)
     airbrake (5.8.1)
       airbrake-ruby (~> 1.8)
     airbrake-ruby (1.8.0)
@@ -137,7 +137,7 @@ GEM
       pry (~> 0.10)
     pry-rails (0.3.9)
       pry (>= 0.10.4)
-    public_suffix (3.0.3)
+    public_suffix (5.0.0)
     puma (3.12.6)
     rack (2.2.3)
     rack-test (1.1.0)