diff --git a/README.md b/README.md
index ea6aae88..e2885add 100644
--- a/README.md
+++ b/README.md
@@ -18,10 +18,12 @@ https://git.f3l.de/dungeonslayers/ds4/-/raw/latest/src/system.json?inline=false
 
 ### Prerequisites
 
-In order to build this system, recent versions of `node` and `npm` are required.
-We recommend using the latest lts version of `node`, which is `v14.15.4` at the
-time of writing. If you use `nvm` to manage your `node` versions, you can simply
-run
+In order to build this system, recent versions of `node` and `yarn` are
+required. Most likely using `npm` also works but only `yarn` is officially
+supported. We recommend using the latest lts version of `node`, which is
+`v14.15.5` at the time of writing. If you use `nvm` to manage your `node`
+versions, you can simply run
+
 ```
 nvm install
 ```
@@ -31,7 +33,7 @@ in the project's root directory.
 You also need to install the the project's dependencies. To do so, run
 
 ```
-npm install
+yarn install
 ```
 
 ### Building
@@ -39,13 +41,13 @@ npm install
 You can build the project by running
 
 ```
-npm run build
+yarn build
 ```
 
 Alternatively, you can run
 
 ```
-npm run build:watch
+yarn build:watch
 ```
 
 to watch for changes and automatically build as necessary.
@@ -68,7 +70,7 @@ On platforms other than Linux you need to adjust the path accordingly.
 Then run
 
 ```
-npm run link
+yarn link-project
 ```
 
 ### Running the tests
@@ -76,7 +78,7 @@ npm run link
 You can run the tests with the following command:
 
 ```
-npm test
+yarn test
 ```
 
 ## Contributing
diff --git a/package.json b/package.json
index 729ee99c..30b476c3 100644
--- a/package.json
+++ b/package.json
@@ -33,9 +33,9 @@
     "scripts": {
         "build": "gulp build",
         "build:watch": "gulp watch",
-        "link": "gulp link",
+        "link-project": "gulp link",
         "clean": "gulp clean && gulp link --clean",
-        "update": "npm install --save-dev github:League-of-Foundry-Developers/foundry-vtt-types#foundry-0.7.9",
+        "update": "yarn add --dev foundry-vtt-types@github:League-of-Foundry-Developers/foundry-vtt-types#foundry-0.7.9",
         "updateManifest": "gulp updateManifest",
         "lint": "eslint 'src/**/*.ts' --cache",
         "lint:fix": "eslint 'src/**/*.ts' --cache --fix",