diff --git a/railties/lib/rails/generators/rails/app/app_generator.rb b/railties/lib/rails/generators/rails/app/app_generator.rb
index 1fdfc3ca524b280f6188aacd8750afdf94ccf354..874bd772c702dc2fa0b0559124143db2cde2bc10 100644
--- a/railties/lib/rails/generators/rails/app/app_generator.rb
+++ b/railties/lib/rails/generators/rails/app/app_generator.rb
@@ -128,6 +128,7 @@ def config_when_updating
       active_storage_config_exist    = File.exist?("config/storage.yml")
       rack_cors_config_exist         = File.exist?("config/initializers/cors.rb")
       assets_config_exist            = File.exist?("config/initializers/assets.rb")
+      csp_config_exist               = File.exist?("config/initializers/content_security_policy.rb")
 
       config
 
@@ -155,6 +156,10 @@ def config_when_updating
         unless assets_config_exist
           remove_file "config/initializers/assets.rb"
         end
+
+        unless csp_config_exist
+          remove_file "config/initializers/content_security_policy.rb"
+        end
       end
     end
 
@@ -432,6 +437,7 @@ def delete_action_cable_files_skipping_action_cable
       def delete_non_api_initializers_if_api_option
         if options[:api]
           remove_file "config/initializers/cookies_serializer.rb"
+          remove_file "config/initializers/content_security_policy.rb"
         end
       end
 
diff --git a/railties/test/generators/api_app_generator_test.rb b/railties/test/generators/api_app_generator_test.rb
index 7791d472d8e716f94da63ab3d80c09220d0c39a1..4815cf63623faf721ac4fbefc72d5f6edfb4150f 100644
--- a/railties/test/generators/api_app_generator_test.rb
+++ b/railties/test/generators/api_app_generator_test.rb
@@ -72,6 +72,7 @@ def test_app_update_does_not_generate_unnecessary_config_files
 
     assert_no_file "config/initializers/cookies_serializer.rb"
     assert_no_file "config/initializers/assets.rb"
+    assert_no_file "config/initializers/content_security_policy.rb"
   end
 
   def test_app_update_does_not_generate_unnecessary_bin_files
@@ -149,6 +150,7 @@ def skipped_files
          bin/yarn
          config/initializers/assets.rb
          config/initializers/cookies_serializer.rb
+         config/initializers/content_security_policy.rb
          lib/assets
          test/helpers
          tmp/cache/assets