diff --git a/tsconfig.json b/tsconfig.json
index 37eb7b9c0..d056caa08 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -3,7 +3,9 @@
     /* Basic Options */
     "target": "es2016",                       /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017','ES2018' or 'ESNEXT'. */
     "module": "commonjs",                     /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'. */
-    // "lib": [],                             /* Specify library files to be included in the compilation. */
+    "lib": [                                  /* Specify library files to be included in the compilation. */
+        "es2017", // Required by `@sindresorhus/is`
+    ],
     // "allowJs": true,                       /* Allow javascript files to be compiled. */
     // "checkJs": true,                       /* Report errors in .js files. */
     "jsx": "react",                           /* Specify JSX code generation: 'preserve', 'react-native', or 'react'. */