diff --git a/Gemfile.lock b/Gemfile.lock
index ea141c4..3cce47b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -38,8 +38,8 @@ GEM
       i18n (~> 0.7)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
-    addressable (2.5.1)
-      public_suffix (~> 2.0, >= 2.0.2)
+    addressable (2.8.0)
+      public_suffix (>= 2.0.2, < 5.0)
     airbrussh (1.3.0)
       sshkit (>= 1.6.1, != 1.7.0)
     arel (8.0.0)
@@ -134,7 +134,7 @@ GEM
     orm_adapter (0.5.0)
     pg (0.21.0)
     popper_js (1.11.1)
-    public_suffix (2.0.5)
+    public_suffix (4.0.6)
     puma (3.9.1)
     rack (2.0.3)
     rack-test (0.6.3)