diff --git a/types/poi/index.d.ts b/types/poi/index.d.ts
index 6613e4b75d17050..f8f3bae66e8a3bb 100644
--- a/types/poi/index.d.ts
+++ b/types/poi/index.d.ts
@@ -2,6 +2,7 @@
 // Project: https://github.com/egoist/poi/
 // Definitions by: c4605 <https://github.com/bolasblack>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+// TypeScript Version: 2.3
 
 import { ICompiler, Configuration as WebpackConfig } from "webpack";
 import { Configuration as WebpackDevServerConfig } from "webpack-dev-server";