diff --git a/ruby/rails-params-json.rb b/ruby/rails-params-json.rb
index 142837d..5412cd7 100644
--- a/ruby/rails-params-json.rb
+++ b/ruby/rails-params-json.rb
@@ -12,6 +12,12 @@ def create
     # ok: rails-params-json
     id4 = params[:something][:id]
 
+    # ruleid: rails-params-json
+    id5 = params.fetch(:_json)
+
+    # ruleid: rails-params-json
+    id6 = params.fetch(:_json, {})
+
     # ruleid: rails-params-json
     product_params = params.require(:_json).map do |product|
       product.permit(:name, :price)
diff --git a/ruby/rails-params-json.yaml b/ruby/rails-params-json.yaml
index ab1df82..56064ba 100644
--- a/ruby/rails-params-json.yaml
+++ b/ruby/rails-params-json.yaml
@@ -19,8 +19,13 @@ rules:
       references:
         - https://nastystereo.com/security/rails-_json-juggling-attack.html
         - https://api.rubyonrails.org/v5.1.7/classes/ActionDispatch/Http/Parameters.html
+        - https://api.rubyonrails.org/classes/ActionController/Parameters.html
     pattern-either:
       - pattern: "params[:_json]"
       - pattern: "params['_json']"
       - pattern: "params.require(:_json)"
       - pattern: "params.require('_json')"
+      - pattern: "params.fetch(:_json, ...)"
+      - pattern: "params.fetch('_json', ...)"
+      - pattern: "params.dig(:_json, ...)"
+      - pattern: "params.dig('_json', ...)"