diff --git a/Gemfile.lock b/Gemfile.lock
index d033c11..73959ad 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 (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     administrate (0.8.1)
       actionpack (>= 4.2, < 5.2)
       actionview (>= 4.2, < 5.2)
@@ -166,7 +166,7 @@ GEM
     orm_adapter (0.5.0)
     pg (0.21.0)
     popper_js (1.12.5)
-    public_suffix (3.0.1)
+    public_suffix (4.0.7)
     puma (3.11.0)
     rack (2.0.3)
     rack-test (0.8.2)