diff --git a/types/jest-environment-puppeteer/index.d.ts b/types/jest-environment-puppeteer/index.d.ts
index 88956e1869..abb0ad02d1 100644
--- a/types/jest-environment-puppeteer/index.d.ts
+++ b/types/jest-environment-puppeteer/index.d.ts
@@ -2,6 +2,7 @@
 // Project: https://github.com/smooth-code/jest-puppeteer
 // Definitions by: Josh Goldberg <https://github.com/joshuakgoldberg>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+// TypeScript Version: 2.3
 
 import { Browser, Page } from "puppeteer";