diff --git a/config/initializers/new_framework_defaults_7_0.rb b/config/initializers/new_framework_defaults_7_0.rb
index 43f6f416229..7ee8ffa85fe 100644
--- a/config/initializers/new_framework_defaults_7_0.rb
+++ b/config/initializers/new_framework_defaults_7_0.rb
@@ -30,7 +30,7 @@ Rails.application.config.action_view.apply_stylesheet_media_default = false
 # Change the digest class for ActiveSupport::Digest.
 # Changing this default means that for example Etags change and
 # various cache keys leading to cache invalidation.
-# Rails.application.config.active_support.hash_digest_class = OpenSSL::Digest::SHA256
+Rails.application.config.active_support.hash_digest_class = OpenSSL::Digest::SHA256
 
 # Don't override ActiveSupport::TimeWithZone.name and use the default Ruby
 # implementation.