diff --git a/types/qs/index.d.ts b/types/qs/index.d.ts
index d3574383a5..2ecbed14be 100644
--- a/types/qs/index.d.ts
+++ b/types/qs/index.d.ts
@@ -1,9 +1,10 @@
-// Type definitions for qs 6.4.0
+// Type definitions for qs 6.5.0
 // Project: https://github.com/ljharb/qs
 // Definitions by: Roman Korneev <https://github.com/RWander>
 //                 Leon Yu <https://github.com/leonyu>
 //                 Belinda Teh <https://github.com/tehbelinda>
 //                 Melvin Lee <https://github.com/zyml>
+//                 Arturs Vonda <https://github.com/artursvonda>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 
 export = QueryString;
@@ -23,6 +24,7 @@ declare namespace QueryString {
         serializeDate?: (d: Date) => string;
         format?: 'RFC1738' | 'RFC3986';
         encodeValuesOnly?: boolean;
+        addQueryPrefix?: boolean;
     }
 
     interface IParseOptions {
@@ -36,6 +38,7 @@ declare namespace QueryString {
         allowPrototypes?: boolean;
         parameterLimit?: number;
         strictNullHandling?: boolean;
+        ignoreQueryPrefix?: boolean;
     }
 
     function stringify(obj: any, options?: IStringifyOptions): string;
diff --git a/types/qs/qs-tests.ts b/types/qs/qs-tests.ts
index d71aa55957..49fe89a4aa 100644
--- a/types/qs/qs-tests.ts
+++ b/types/qs/qs-tests.ts
@@ -233,6 +233,11 @@ qs.parse('a=b&c=d', { delimiter: '&' });
     assert.deepEqual(parsedStrictNull, { a: null, b: '' });
 }
 
+() => {
+    var parsedQueryPrefix = qs.parse('?a&b=', { ignoreQueryPrefix: true });
+    assert.deepEqual(parsedQueryPrefix, { a: '', b: '' });
+}
+
 () => {
     var nullsSkipped = qs.stringify({ a: 'b', c: null }, { skipNulls: true });
     assert.equal(nullsSkipped, 'a=b');
@@ -278,3 +283,7 @@ qs.parse('a=b&c=d', { delimiter: '&' });
     );
     assert.equal(encodedValues,'a=b&c[0]=d&c[1]=e%3Df&f[0][0]=g&f[1][0]=h');
 }
+
+() => {
+    assert.equal(qs.stringify({ a: 'b' }, { addQueryPrefix: true }), '?a=b');
+}