diff --git a/package.json b/package.json
index 408f02b2ade7fa..0bb6daaf460a3a 100644
--- a/package.json
+++ b/package.json
@@ -31,5 +31,8 @@
             "_comment": "This will remove husky from when we started migrating to use prettier",
             "pre-commit": "npm uninstall husky"
         }
+    },
+    "dependencies": {
+        "@types/node": "^13.7.0"
     }
 }
diff --git a/types/json-file-plus/index.d.ts b/types/json-file-plus/index.d.ts
index 8839ca72e85585..7b8b4035ef0def 100644
--- a/types/json-file-plus/index.d.ts
+++ b/types/json-file-plus/index.d.ts
@@ -3,13 +3,15 @@
 // Definitions by: Daniel Byrne <https://github.com/danwbyrne>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 
+/// <reference types="node" />
+
 declare function readJSON(filename: string): Promise<readJSON.JSONFile>;
 
 declare namespace readJSON {
   function sync(filename: string): JSONFile;
 
   interface Format {
-    readonly indent: number;
+    readonly indent: number | '\t';
     readonly trailing: boolean;
   }
 
@@ -17,9 +19,10 @@ declare namespace readJSON {
     format: Format;
     data: any;
     constructor(raw: string);
-    get: (key: string) => Promise<any>;
+    get: (key: PropertyKey) => Promise<any>;
     set: (data: any) => void;
-    remove: (key: string) => Promise<void>;
+    remove: (key: PropertyKey) => Promise<void>;
+    stringify: () => Buffer;
   }
 
   class JSONFile extends JSONData {