diff --git a/src/lib/core.d.ts b/src/lib/core.d.ts
index f177c421f4f87..442921ca5a41f 100644
--- a/src/lib/core.d.ts
+++ b/src/lib/core.d.ts
@@ -971,14 +971,14 @@ interface JSON {
       * @param replacer A function that transforms the results.
       * @param space Adds indentation, white space, and line break characters to the return-value JSON text to make it easier to read.
       */
-    stringify(value: any, replacer: (key: string, value: any) => any, space: any): string;
+    stringify(value: any, replacer: (key: string, value: any) => 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 Array that transforms the results.
       * @param space Adds indentation, white space, and line break characters to the return-value JSON text to make it easier to read.
       */
-    stringify(value: any, replacer: any[], space: any): string;
+    stringify(value: any, replacer: any[], space: string | number): string;
 }
 /**
   * An intrinsic object that provides functions to convert JavaScript values to and from the JavaScript Object Notation (JSON) format.
@@ -1181,4 +1181,4 @@ interface PromiseLike<T> {
     */
     then<TResult>(onfulfilled?: (value: T) => TResult | PromiseLike<TResult>, onrejected?: (reason: any) => TResult | PromiseLike<TResult>): PromiseLike<TResult>;
     then<TResult>(onfulfilled?: (value: T) => TResult | PromiseLike<TResult>, onrejected?: (reason: any) => void): PromiseLike<TResult>;
-}
+}