diff --git a/Gemfile.lock b/Gemfile.lock
index 996fc318..34d57d31 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -56,8 +56,8 @@ GEM
       i18n (>= 0.7, < 2)
       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)
     amq-protocol (2.3.0)
     ast (2.4.0)
     atomic (1.1.101)
@@ -745,7 +745,7 @@ GEM
     pry (0.11.3)
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
-    public_suffix (3.0.3)
+    public_suffix (4.0.6)
     puma (3.12.6)
     pusher (1.3.2)
       httpclient (~> 2.7)