diff --git a/Gemfile.lock b/Gemfile.lock
index f8b9a53..6dce9dd 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -44,8 +44,8 @@ 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)
     airbrussh (1.3.3)
       sshkit (>= 1.6.1, != 1.7.0)
     arel (9.0.0)
@@ -156,7 +156,7 @@ GEM
       mini_portile2 (~> 2.4.0)
     orm_adapter (0.5.0)
     pg (1.1.4)
-    public_suffix (3.1.0)
+    public_suffix (5.0.0)
     puma (3.12.1)
     rack (2.0.7)
     rack-protection (2.0.5)