diff --git a/lib/twingly/public_suffix_list.rb b/lib/twingly/public_suffix_list.rb
index f2de687..02163d9 100644
--- a/lib/twingly/public_suffix_list.rb
+++ b/lib/twingly/public_suffix_list.rb
@@ -15,17 +15,15 @@ def self.with_punycoded_names(encoding: Encoding::UTF_8)
 
       punycoded_names(list).each do |punycoded_name|
         new_rule = PublicSuffix::Rule.factory(punycoded_name)
-        list.add(new_rule, reindex: false)
+        list.add(new_rule)
       end
 
-      list.reindex!
-
       list
     end
 
     private_class_method \
     def self.punycoded_names(list)
-      names = list.map { |rule| Addressable::IDNA.to_ascii(rule.value) }
+      names = list.each.map { |rule| Addressable::IDNA.to_ascii(rule.value) }
       names.select { |name| punycoded_name?(name) }
     end
 
diff --git a/twingly-url.gemspec b/twingly-url.gemspec
index 0b7dcd3..1f0bc9a 100644
--- a/twingly-url.gemspec
+++ b/twingly-url.gemspec
@@ -12,8 +12,8 @@ Gem::Specification.new do |s|
   s.license     = "MIT"
   s.required_ruby_version = "~> 2.2"
 
-  s.add_dependency "addressable", "= 2.5.0"
-  s.add_dependency "public_suffix", "= 2.0.3"
+  s.add_dependency "addressable", "= 2.5.2"
+  s.add_dependency "public_suffix", "= 3.0.1"
 
   s.add_development_dependency "rake", "~> 10"
   s.add_development_dependency "rspec", "~> 3"