As you may or may not know, TSD was recently deprecated, and the author has recommended that users switch to Typings instead. Luckily for us, it's something that can be done in just a few easy steps. I've outlined them below:
Step 1: Remove `typings` dir.
$ rm -rf typings
Step 2: Uninstall TSD.
$ npm uninstall tsd --save
Step 3: Install Typings.
$ npm install typings --save
Step 4: Upgrade TSD JSON file to Typings JSON file.
$ typings init --upgrade
Step 5: Remove `tsd.json` file locally
$ rm tsd.json
Typings will automatically resolve ambient definitions for you that were previously installed using TSD.