diff --git a/app/models/ng_word.rb b/app/models/ng_word.rb
index 995d454ca4..2bfe7597e1 100644
--- a/app/models/ng_word.rb
+++ b/app/models/ng_word.rb
@@ -16,6 +16,7 @@ class NgWord < ApplicationRecord
   attr_accessor :keywords, :regexps, :strangers
 
   validate :check_regexp
+  after_commit :invalidate_cache!
 
   class << self
     def caches
diff --git a/app/models/sensitive_word.rb b/app/models/sensitive_word.rb
index baefc8bc86..a46175e213 100644
--- a/app/models/sensitive_word.rb
+++ b/app/models/sensitive_word.rb
@@ -17,6 +17,7 @@ class SensitiveWord < ApplicationRecord
   attr_accessor :keywords, :regexps, :remotes, :spoilers
 
   validate :check_regexp
+  after_commit :invalidate_cache!
 
   class << self
     def caches