diff --git a/types/comment-json/comment-json-tests.ts b/types/comment-json/comment-json-tests.ts
index af91ff422f..56aa8453fe 100644
--- a/types/comment-json/comment-json-tests.ts
+++ b/types/comment-json/comment-json-tests.ts
@@ -14,3 +14,11 @@ const result = commentJson.parse(`
 // comment at the bottom
 `);
 const str = commentJson.stringify(result);
+
+const numericallyIndexed = commentJson.stringify(result, (key, value) => {
+return key && Number.isInteger(Number(key))
+    ? value
+    : undefined;
+});
+
+const whiteListed = commentJson.stringify(result, ['a', 1]);
diff --git a/types/comment-json/index.d.ts b/types/comment-json/index.d.ts
index 9c2652f34e..0aad1934ff 100644
--- a/types/comment-json/index.d.ts
+++ b/types/comment-json/index.d.ts
@@ -4,5 +4,20 @@
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 
 export type Reviver = (k: number | string, v: any) => any;
+
+/**
+ * Converts a JavaScript Object Notation (JSON) string into an object.
+ * @param json A valid JSON string.
+ * @param reviver A function that transforms the results. This function is called for each member of the object.
+ * @param removes_comments If true, the comments won't be maintained, which is often used when we want to get a clean object.
+ * If a member contains nested objects, the nested objects are transformed before the parent object is.
+ */
 export function parse(json: string, reviver?: Reviver, removes_comments?: boolean): any;
-export function stringify(value: any, replacer?: any, space?: string | number): string;
+
+/**
+ * Converts a JavaScript value to a JavaScript Object Notation (JSON) string.
+ * @param value A JavaScript value, usually an object or array, to be converted.
+ * @param replacer A function that transforms the results or an array of strings and numbers that acts as a approved list for selecting the object properties that will be stringified.
+ * @param space Adds indentation, white space, and line break characters to the return-value JSON text to make it easier to read.
+ */
+export function stringify(value: any, replacer?: ((key: string, value: any) => any) | Array<number | string> | null, space?: string | number): string;