I have tested simple code: ```require("gkm").events.on("key.typed",console.log);``` Output: ``` [ 'Undefined' ] [ 'Undefined' ] [ 'Undefined' ] ``` Node version: v8.6.0 NPM version: v5.3.0 `java` version: 1.8.0_91 `javac` version: 1.8.0_60 OS: Windows 7 (x64)