diff --git a/Gemfile.lock b/Gemfile.lock
index 56ac719..907ff51 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -38,8 +38,8 @@ GEM
       i18n (~> 0.7)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
-    addressable (2.5.2)
-      public_suffix (>= 2.0.2, < 4.0)
+    addressable (2.8.0)
+      public_suffix (>= 2.0.2, < 5.0)
     arel (8.0.0)
     bcrypt (3.1.11)
     bindex (0.5.0)
@@ -107,7 +107,7 @@ GEM
       capybara (~> 2.1)
       cliver (~> 0.3.1)
       websocket-driver (>= 0.2.0)
-    public_suffix (3.0.1)
+    public_suffix (4.0.6)
     puma (3.11.0)
     rack (2.0.3)
     rack-proxy (0.6.3)