diff --git a/Gemfile.lock b/Gemfile.lock
index 433f8b0..ab216d9 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -53,8 +53,8 @@ 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)
     arbre (1.2.1)
       activesupport (>= 3.0.0)
     arel (9.0.0)
@@ -157,7 +157,7 @@ GEM
     polyamorous (2.3.2)
       activerecord (>= 5.2.1)
     popper_js (1.14.5)
-    public_suffix (3.0.2)
+    public_suffix (4.0.6)
     puma (4.3.8)
       nio4r (~> 2.0)
     racc (1.5.2)