diff --git a/src/utils.js b/src/utils.js
index 9b485e29c..58a46f488 100644
--- a/src/utils.js
+++ b/src/utils.js
@@ -74,20 +74,20 @@ export const detectInit = function (text, cnf) {
     let args = inits.map((init) => init.args);
     Object.keys(args).forEach((argKey) => {
       Object.keys(args[argKey]).forEach((key) => {
-        // if (key.indexOf('__') === 0) {
-        //   log.debug('sanitize deleting prototype option', args[key]);
-        //   delete args[argKey][key];
-        // }
+        if (key.indexOf('__') === 0) {
+          log.debug('sanitize deleting prototype option', args[key]);
+          delete args[argKey][key];
+        }
 
-        // if (key.indexOf('proto') >= 0) {
-        //   log.debug('sanitize deleting prototype option', args[key]);
-        //   delete args[argKey][key];
-        // }
+        if (key.indexOf('proto') >= 0) {
+          log.debug('sanitize deleting prototype option', args[key]);
+          delete args[argKey][key];
+        }
 
-        // if (key.indexOf('constr') >= 0) {
-        //   log.debug('sanitize deleting prototype option', args[key]);
-        //   delete args[argKey][key];
-        // }
+        if (key.indexOf('constr') >= 0) {
+          log.debug('sanitize deleting prototype option', args[key]);
+          delete args[argKey][key];
+        }
         if(configKeys.indexOf(key)<0) {
           log.debug('sanitize deleting option', args[argKey][key]);
           delete args[argKey][key];