diff --git a/Gemfile.lock b/Gemfile.lock
index 0911412..cfce359 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -57,8 +57,8 @@ GEM
       i18n (~> 0.7)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
-    addressable (2.5.1)
-      public_suffix (~> 2.0, >= 2.0.2)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     airbrake (6.1.2)
       airbrake-ruby (~> 2.2, >= 2.2.5)
     airbrake-ruby (2.2.6)
@@ -180,7 +180,7 @@ GEM
       yard (~> 0.9)
     pry-rails (0.3.6)
       pry (>= 0.10.4)
-    public_suffix (2.0.5)
+    public_suffix (4.0.7)
     puma (3.9.1)
     pundit (1.1.0)
       activesupport (>= 3.0.0)