diff --git a/Gemfile.lock b/Gemfile.lock
index 1e134e3..05ed01f 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -50,8 +50,8 @@ GEM
       activerecord (~> 5.0)
     acts_as_list (0.9.19)
       activerecord (>= 3.0)
-    addressable (2.6.0)
-      public_suffix (>= 2.0.2, < 4.0)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     anticipate (0.1.1)
     archive-zip (0.12.0)
       io-like (~> 0.3.0)
@@ -260,7 +260,7 @@ GEM
       method_source (~> 0.9.0)
     pry-rails (0.3.9)
       pry (>= 0.10.4)
-    public_suffix (3.1.1)
+    public_suffix (5.0.0)
     puma (4.1.0)
       nio4r (~> 2.0)
     racc (1.5.2)