diff --git a/Gemfile.lock b/Gemfile.lock
index e1732fcd..1134906d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -84,8 +84,8 @@ GEM
       tzinfo (~> 1.1)
     acts_as_list (0.9.15)
       activerecord (>= 3.0)
-    addressable (2.5.2)
-      public_suffix (>= 2.0.2, < 4.0)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     annotate (2.7.4)
       activerecord (>= 3.2, < 6.0)
       rake (>= 10.4, < 13.0)
@@ -232,7 +232,7 @@ GEM
       method_source (~> 0.9.0)
     pry-rails (0.3.6)
       pry (>= 0.10.4)
-    public_suffix (3.0.3)
+    public_suffix (5.0.0)
     pygments.rb (1.2.1)
       multi_json (>= 1.0.0)
     rack (2.2.3)