diff --git a/package.json b/package.json
index 68850b7..aa6f266 100644
--- a/package.json
+++ b/package.json
@@ -47,7 +47,8 @@
     "prettier-check": "^2.0.0",
     "react": "16.0.0",
     "react-native": "^0.50.4",
-    "react-test-renderer": "16.0.0"
+    "react-test-renderer": "16.0.0",
+    "typelevel-ts": "^0.2.2"
   },
   "engines": {
     "node": "9.2.0",
diff --git a/yarn.lock b/yarn.lock
index df15a38..0390c43 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -4074,6 +4074,10 @@ typedarray@^0.0.6:
   version "0.0.6"
   resolved "https://registry.yarnpkg.com/typedarray/-/typedarray-0.0.6.tgz#867ac74e3864187b1d3d47d996a78ec5c8830777"
 
+typelevel-ts@^0.2.2:
+  version "0.2.2"
+  resolved "https://registry.yarnpkg.com/typelevel-ts/-/typelevel-ts-0.2.2.tgz#a8f9a0a77e7d747e4990a4819db9bb87f79fe012"
+
 ua-parser-js@^0.7.9:
   version "0.7.13"
   resolved "https://registry.yarnpkg.com/ua-parser-js/-/ua-parser-js-0.7.13.tgz#cd9dd2f86493b3f44dbeeef3780fda74c5ee14be"