diff --git a/Gemfile.lock b/Gemfile.lock
index de8ce63..d0a6cde 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -45,8 +45,8 @@ 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)
     airbrussh (1.3.0)
       sshkit (>= 1.6.1, != 1.7.0)
     arel (8.0.0)
@@ -198,7 +198,7 @@ GEM
       coderay (~> 1.1.0)
       method_source (~> 0.8.1)
       slop (~> 3.4)
-    public_suffix (2.0.5)
+    public_suffix (5.0.0)
     puma (3.9.1)
     rack (2.0.3)
     rack-contrib (1.2.0)