diff --git a/index.js b/index.js
index e1db09a..e912c36 100644
--- a/index.js
+++ b/index.js
@@ -68,6 +68,20 @@ class Parameter {
 
     var errors = [];
 
+    if (rules._strict && rules._strict.required) {
+      var okeys = Object.keys(obj);
+      for (let i = 0 ; i < okeys.length; i++) {
+        if (!(okeys[i] in rules)) {
+          errors.push({
+            message: this.t('required'),
+            field: this.t(okeys[i]),
+            code: this.t('not declared as incoming parameters')
+          });
+        }
+      }
+    }
+    delete rules._strict;
+
     for (var key in rules) {
       var rule = formatRule(rules[key]);
       var value = obj[key];