diff --git a/Gemfile.lock b/Gemfile.lock
index e34da0a..79c42f3 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -70,8 +70,8 @@ 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)
     arbre (1.1.1)
       activesupport (>= 3.0.0)
     arel (8.0.0)
@@ -210,7 +210,7 @@ GEM
     pry (0.11.2)
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
-    public_suffix (3.0.0)
+    public_suffix (5.0.0)
     puma (3.10.0)
     rack (2.0.3)
     rack-test (0.7.0)