diff --git a/xml2js/xml2js-tests.ts b/xml2js/xml2js-tests.ts
index 45472c0aa..d0ed5e5b9 100644
--- a/xml2js/xml2js-tests.ts
+++ b/xml2js/xml2js-tests.ts
@@ -17,3 +17,10 @@ var outString = builder.buildObject({
 });
 
 var parser = new xml2js.Parser();
+
+var v1Defaults = xml2js.defaults['0.1'];
+v1Defaults.async = true;
+
+var v2Defaults = xml2js.defaults['0.2'];
+v2Defaults.async = false;
+v2Defaults.chunkSize = 20000;
\ No newline at end of file
diff --git a/xml2js/xml2js.d.ts b/xml2js/xml2js.d.ts
index 0dc03add7..8e20ece75 100644
--- a/xml2js/xml2js.d.ts
+++ b/xml2js/xml2js.d.ts
@@ -1,6 +1,6 @@
 // Type definitions for node-xml2js
 // Project: https://github.com/Leonidas-from-XIV/node-xml2js
-// Definitions by: Michel Salib <https://github.com/michelsalib>, Jason McNeil <https://github.com/jasonrm>
+// Definitions by: Michel Salib <https://github.com/michelsalib>, Jason McNeil <https://github.com/jasonrm>, Christopher Currens <https://github.com/ccurrens>
 // Definitions: https://github.com/borisyankov/DefinitelyTyped
 
 declare module 'xml2js' {
@@ -11,6 +11,11 @@ declare module 'xml2js' {
         function parseString(xml: string, callback: (err: any, result: any) => void): void;
         function parseString(xml: string, options: Options, callback: (err: any, result: any) => void): void;
 
+        var defaults: {
+            '0.1': Options;
+            '0.2': OptionsV2;
+        }
+
         class Builder {
             constructor(options?: BuilderOptions);
             buildObject(rootObj: any): string;
@@ -50,7 +55,8 @@ declare module 'xml2js' {
         interface Options {
             async?: boolean;
             attrkey?: string;
-            attrNameProcessors?: (name: string) => string;
+            attrNameProcessors?: [(name: string) => string];
+            attrValueProcessors?: [(name: string) => string];
             charkey?: string;
             charsAsChildren?: boolean;
             childkey?: string;
@@ -67,7 +73,27 @@ declare module 'xml2js' {
             tagNameProcessors?: [(name: string) => string];
             trim?: boolean;
             validator?: Function;
+            valueProcessors?: [(name: string) => string];
             xmlns?: boolean;
         }
+
+        interface OptionsV2 extends Options {
+            preserveChildrenOrder?: boolean;
+            rootName?: string;
+            xmldec?: {
+                version: string;
+                encoding?: string;
+                standalone?: boolean;
+            };
+            doctype?: any;
+            renderOpts?: {
+                pretty?: boolean;
+                indent?: string;
+                newline?: string;
+            };
+            headless?: boolean;
+            chunkSize?: number;
+            cdata?: boolean;
+        }
     }
 }