diff --git a/src/cli/cli.mjs b/src/cli/cli.mjs
index 95be1568..cf5957e3 100755
--- a/src/cli/cli.mjs
+++ b/src/cli/cli.mjs
@@ -1,5 +1,5 @@
 #!/usr/bin/env node
-'use strict';
+
 /*eslint-disable no-console*/
 import fs from 'fs';
 import path from 'path';
diff --git a/src/cli/read.js b/src/cli/read.js
index f08516a5..1cf96c18 100644
--- a/src/cli/read.js
+++ b/src/cli/read.js
@@ -1,4 +1,4 @@
-'use strict';
+
 
 // Copyright 2013 Timothy J Fontaine <tjfontaine@gmail.com>
 //
diff --git a/src/fxp.js b/src/fxp.js
index 690fa637..e9882b5a 100644
--- a/src/fxp.js
+++ b/src/fxp.js
@@ -1,4 +1,4 @@
-'use strict';
+
 
 import  * as XMLValidator from './validator.js';
 import  XMLParser from './xmlparser/XMLParser.js';
diff --git a/src/util.js b/src/util.js
index 309c4ad1..8fb82c05 100644
--- a/src/util.js
+++ b/src/util.js
@@ -1,4 +1,4 @@
-'use strict';
+
 
 const nameStartChar = ':A-Za-z_\\u00C0-\\u00D6\\u00D8-\\u00F6\\u00F8-\\u02FF\\u0370-\\u037D\\u037F-\\u1FFF\\u200C-\\u200D\\u2070-\\u218F\\u2C00-\\u2FEF\\u3001-\\uD7FF\\uF900-\\uFDCF\\uFDF0-\\uFFFD';
 const nameChar = nameStartChar + '\\-.\\d\\u00B7\\u0300-\\u036F\\u203F-\\u2040';
diff --git a/src/xmlbuilder/json2xml.js b/src/xmlbuilder/json2xml.js
index 8a6d283e..78a11aff 100644
--- a/src/xmlbuilder/json2xml.js
+++ b/src/xmlbuilder/json2xml.js
@@ -1,4 +1,4 @@
-'use strict';
+
 //parse Empty Node as self closing node
 import  buildFromOrderedJs from './orderedJs2Xml.js';
 
diff --git a/src/xmlparser/OrderedObjParser.js b/src/xmlparser/OrderedObjParser.js
index 3c2f1428..6790d6d4 100644
--- a/src/xmlparser/OrderedObjParser.js
+++ b/src/xmlparser/OrderedObjParser.js
@@ -1,4 +1,4 @@
-'use strict';
+
 ///@ts-check
 
 import * as util from '../util.js';
diff --git a/src/xmlparser/node2json.js b/src/xmlparser/node2json.js
index 8210f45c..f00b41af 100644
--- a/src/xmlparser/node2json.js
+++ b/src/xmlparser/node2json.js
@@ -1,4 +1,4 @@
-'use strict';
+
 
 /**
  * 
diff --git a/src/xmlparser/xmlNode.js b/src/xmlparser/xmlNode.js
index 8177d352..a129b8cb 100644
--- a/src/xmlparser/xmlNode.js
+++ b/src/xmlparser/xmlNode.js
@@ -1,4 +1,4 @@
-'use strict';
+
 
 class XmlNode{
   constructor(tagname) {