diff --git a/Readme.md b/Readme.md
index 912c5697..420cbc37 100644
--- a/Readme.md
+++ b/Readme.md
@@ -229,6 +229,7 @@ Note: for versions of node >0.10.X, you may need to specify `{connection: 'keep-
   - `crl` (*string* | *string[]*: PEM encoded CRLs (Certificate Revocation List)
   - `ciphers` (*string*): A description of the ciphers to use or exclude, separated by `:`. The default cipher suite is:
   - `enableChunkedEncoding` (*boolean*): Controls chunked transfer encoding in response. Some clients (such as Windows 10's MDM enrollment SOAP client) are sensitive to transfer-encoding mode and can't accept chunked response. This option lets users disable chunked transfer encoding for such clients. (**Default:** `true`)
+  - `envelopeKey` (*string*): Set a custom envelope key. (**Default:** `'soap'`)
 - `services` (*Object*)
 - `wsdl` (*string*): An XML string that defines the service.
 - `callback` (*Function*): A function to run after the server has been initialized.
diff --git a/src/server.ts b/src/server.ts
index da04e6a1..aeb74257 100644
--- a/src/server.ts
+++ b/src/server.ts
@@ -199,6 +199,7 @@ export class Server extends EventEmitter {
     this.wsdl.options.attributesKey = options.attributesKey || 'attributes';
     this.onewayOptions.statusCode = this.onewayOptions.responseCode || 200;
     this.onewayOptions.emptyBody = !!this.onewayOptions.emptyBody;
+    this.wsdl.options.envelopeKey = options.envelopeKey || 'soap';
   }
 
   private _processRequestXml(req: Request, res: Response, xml) {
@@ -599,13 +600,14 @@ export class Server extends EventEmitter {
     const ns = defs.$targetNamespace;
     const encoding = '';
     const alias = findPrefix(defs.xmlns, ns);
+    const envelopeKey = this.wsdl.options.envelopeKey;
 
     const envelopeDefinition = this.wsdl.options.forceSoap12Headers
       ? 'http://www.w3.org/2003/05/soap-envelope'
       : 'http://schemas.xmlsoap.org/soap/envelope/';
 
     let xml = '<?xml version="1.0" encoding="utf-8"?>' +
-      '<soap:Envelope xmlns:soap="' + envelopeDefinition + '" ' +
+      '<' + envelopeKey + ':Envelope' + ' xmlns:' + envelopeKey + '=' + '"' + envelopeDefinition + '" ' +
       encoding +
       this.wsdl.xmlnsInEnvelope + '>';
 
@@ -627,12 +629,10 @@ export class Server extends EventEmitter {
     }
 
     if (headers !== '') {
-      xml += '<soap:Header>' + headers + '</soap:Header>';
+      xml += '<' + envelopeKey + ':Header>' + headers + '</' + envelopeKey + ':Header>';
     }
-
-    xml += body ? '<soap:Body>' + body + '</soap:Body>' : '<soap:Body/>';
-
-    xml += '</soap:Envelope>';
+    xml += body ? '<' + envelopeKey + ':Body>' + body + '</' + envelopeKey + ':Body>' : '<' + envelopeKey + ':Body/>';
+    xml += '</' + envelopeKey + ':Envelope>';
     return xml;
   }
 
diff --git a/src/types.ts b/src/types.ts
index 4e4f9819..59d8c9dc 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -156,6 +156,7 @@ export interface IServerOptions extends IWsdlBaseOptions {
   oneWay?: IOneWayOptions;
   /** A boolean for controlling chunked transfer encoding in response. Some client (such as Windows 10's MDM enrollment SOAP client) is sensitive to transfer-encoding mode and can't accept chunked response. This option let user disable chunked transfer encoding for such a client. Default to true for backward compatibility. */
   enableChunkedEncoding?: boolean;
+  envelopeKey?: string;
 }
 
 export interface IMTOMAttachments {
diff --git a/test/server-options-test.js b/test/server-options-test.js
index cbbb6ca9..de86d124 100644
--- a/test/server-options-test.js
+++ b/test/server-options-test.js
@@ -625,4 +625,72 @@ describe('SOAP Server with Options', function () {
     });
   });
 
+  it('should return soapenv as envelope key when it is set to soapenv', function (done) {
+    test.server.listen(15099, null, null, function () {
+      test.soapServer = soap.listen(test.server, {
+        path: '/stockquote',
+        services: test.service,
+        xml: test.wsdl,
+        uri: __dirname + '/wsdl/strict/',
+        envelopeKey: 'soapenv'
+      }, test.service, test.wsdl);
+      test.baseUrl = 'http://' + test.server.address().address + ":" + test.server.address().port;
+
+      //windows return 0.0.0.0 as address and that is not
+      //valid to use in a request
+      if (test.server.address().address === '0.0.0.0' || test.server.address().address === '::') {
+        test.baseUrl = 'http://127.0.0.1:' + test.server.address().port;
+      }
+      // console.log(test.baseUrl);
+      axios.post(
+        test.baseUrl + '/stockquote',
+        '<soapenv:Envelope' +
+        ' xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/"' +
+        ' xmlns:soap="http://service.applicationsnet.com/soap/">' +
+        '  <soapenv:Header/>' +
+        '  <soapenv:Body>' +
+        '</soapenv:Envelope>'
+      ).then(res => {
+        assert.ok(res.data.indexOf('soapenv:Envelope') > -1);
+        done();
+      }).catch(err => {
+        throw err;
+      });
+    });
+  });
+
+  it('should return soap as envelope key by default', function (done) {
+    test.server.listen(15099, null, null, function () {
+      test.soapServer = soap.listen(test.server, {
+        path: '/stockquote',
+        services: test.service,
+        xml: test.wsdl,
+        uri: __dirname + '/wsdl/strict/',
+        forceSoap12Headers: true
+      }, test.service, test.wsdl);
+      test.baseUrl = 'http://' + test.server.address().address + ":" + test.server.address().port;
+
+      //windows return 0.0.0.0 as address and that is not
+      //valid to use in a request
+      if (test.server.address().address === '0.0.0.0' || test.server.address().address === '::') {
+        test.baseUrl = 'http://127.0.0.1:' + test.server.address().port;
+      }
+      // console.log(test.baseUrl);
+      axios.post(
+        test.baseUrl + '/stockquote',
+        '<soapenv:Envelope' +
+        ' xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/"' +
+        ' xmlns:soap="http://service.applicationsnet.com/soap/">' +
+        '  <soapenv:Header/>' +
+        '  <soapenv:Body>' +
+        '</soapenv:Envelope>'
+      ).then(res => {
+        assert.ok(res.data.indexOf('soap:Envelope') > -1);
+        done();
+      }).catch(err => {
+        throw err;
+      });
+    });
+  });
+
 });