diff --git a/Gemfile.lock b/Gemfile.lock
index 3f0d951..55a9c51 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -56,8 +56,8 @@ 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 (9.2.1)
       airbrake-ruby (~> 4.3)
     airbrake-ruby (4.3.0)
@@ -209,7 +209,7 @@ GEM
     pry-byebug (3.7.0)
       byebug (~> 11.0)
       pry (~> 0.10)
-    public_suffix (3.0.3)
+    public_suffix (4.0.7)
     puma (3.12.2)
     rack (2.0.7)
     rack-protection (2.0.5)