diff --git a/.circleci/config.yml b/.circleci/config.yml
index aef1b221..6ab3b99d 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -17,7 +17,7 @@ jobs:
             - node_modules-{{ arch }}-node12.13.1-{{ checksum "package.json" }}-{{ checksum "yarn.lock" }}
       - run:
           name: Install packages
-          command: npm install
+          command: yarn install
       - save_cache:
           name: Saving cache - node_modules
           key: node_modules-{{ arch }}-node12.13.1-{{ checksum "package.json" }}-{{ checksum "yarn.lock" }}
@@ -25,4 +25,4 @@ jobs:
             - node_modules
       - run:
           name: spec
-          command: npm run spec
+          command: yarn run spec
diff --git a/DEVELOPMENT.md b/DEVELOPMENT.md
index 04338d34..24562b7a 100644
--- a/DEVELOPMENT.md
+++ b/DEVELOPMENT.md
@@ -52,7 +52,7 @@ and register your KeyChain.
 Then, create a Mac App ID like `org.whalebird.desktop`.
 
 ```bash
-$ npm run build:mas
+$ yarn run build:mas
 
 # This command automatically loads the certificates from you keychain.
 $ ./appStore.sh
diff --git a/Makefile b/Makefile
index 0f1e64d4..f43f9491 100644
--- a/Makefile
+++ b/Makefile
@@ -5,22 +5,22 @@ VERSION = 1.0.0
 all: build mac linux win32 win64
 
 install: package.json
-	npm install
+	yarn install
 
 build: install
-	npm run build
+	yarn run build
 
 mac:
-	npm run package:mac
+	yarn run package:mac
 	mv build/Whalebird-${VERSION}-mac.dmg build/Whalebird-${VERSION}-darwin-x64.dmg
 	cd build; shasum -a 256 Whalebird-${VERSION}-darwin-x64.dmg >> sha256sum.txt
 
 mas:
-	npm run build:mas
+	yarn run build:mas
 	./appStore.sh
 
 linux:
-	npm run package:linux
+	yarn run package:linux
 	mv build/Whalebird-${VERSION}-linux-amd64.deb build/Whalebird-${VERSION}-linux-x64.deb
 	mv build/Whalebird-${VERSION}-linux-x86_64.rpm build/Whalebird-${VERSION}-linux-x64.rpm
 	mv build/Whalebird-${VERSION}-linux-i386.deb build/Whalebird-${VERSION}-linux-ia32.deb
@@ -38,14 +38,14 @@ linux:
 	cd build; shasum -a 256 Whalebird-${VERSION}-linux-x64.tar.bz2 >> sha256sum.txt
 
 win32:
-	npm run package:win32
+	yarn run package:win32
 	mv build/Whalebird-${VERSION}-win.exe build/Whalebird-${VERSION}-windows-ia32.exe
 	cd build; shasum -a 256 Whalebird-${VERSION}-windows-ia32.exe >> sha256sum.txt
 
 win64:
-	npm run package:win64
+	yarn run package:win64
 	mv build/Whalebird-${VERSION}-win.exe build/Whalebird-${VERSION}-windows-x64.exe
 	cd build; shasum -a 256 Whalebird-${VERSION}-windows-x64.exe >> sha256sum.txt
 
 clean:
-	npm run build:clean
+	yarn run build:clean
diff --git a/package.json b/package.json
index 93f35217..d86d9c96 100644
--- a/package.json
+++ b/package.json
@@ -27,19 +27,19 @@
     "build": "node .electron-vue/build.js",
     "build:clean": "cross-env BUILD_TARGET=clean node .electron-vue/build.js",
     "build:web": "cross-env BUILD_TARGET=web node .electron-vue/build.js",
-    "build:mac": "npm run build && npm run package:mac",
-    "build:linux": "npm run build && npm run package:linux",
-    "build:win32": "npm run build && npm run package:win32",
-    "build:win64": "npm run build && npm run package:win64",
-    "build:mas": "npm run build:clean && npm run pack && electron-packager ./ 'Whalebird' --platform=mas --arch=x64 --electron-version=10.1.0 --asar.unpackDir='build/sounds' --out=packages --ignore='^/src' --ignore='^/.electron-vue' --ignore='^/.envrc' --ignore='^/packages' --ignore='^/plist' --ignore='^/static' --ignore='^/whalebird.db' --ignore='^/screenshot.png' --prune=true --icon=./build/icons/icon.icns --overwrite --app-bundle-id=org.whalebird.desktop --app-version=$npm_package_config_appVersion --build-version=$npm_package_config_buildVersion --extend-info='./plist/team.plist' --osx-sign --app-category-type=public.app-category.social-networking",
+    "build:mac": "yarn run build && yarn run package:mac",
+    "build:linux": "yarn run build && yarn run package:linux",
+    "build:win32": "yarn run build && yarn run package:win32",
+    "build:win64": "yarn run build && yarn run package:win64",
+    "build:mas": "yarn run build:clean && yarn run pack && electron-packager ./ 'Whalebird' --platform=mas --arch=x64 --electron-version=10.1.0 --asar.unpackDir='build/sounds' --out=packages --ignore='^/src' --ignore='^/.electron-vue' --ignore='^/.envrc' --ignore='^/packages' --ignore='^/plist' --ignore='^/static' --ignore='^/whalebird.db' --ignore='^/screenshot.png' --prune=true --icon=./build/icons/icon.icns --overwrite --app-bundle-id=org.whalebird.desktop --app-version=$npm_package_config_appVersion --build-version=$npm_package_config_buildVersion --extend-info='./plist/team.plist' --osx-sign --app-category-type=public.app-category.social-networking",
     "package:mac": "electron-builder --mac --x64",
     "package:linux": "electron-builder --linux",
     "package:win32": "electron-builder --win --ia32",
     "package:win64": "electron-builder --win --x64",
-    "pack": "npm run pack:main && npm run pack:renderer",
+    "pack": "yarn run pack:main && yarn run pack:renderer",
     "pack:main": "cross-env NODE_ENV=production webpack --mode production --progress --colors --config .electron-vue/webpack.main.config.js",
     "pack:renderer": "cross-env NODE_ENV=production webpack --mode production --progress --colors --config .electron-vue/webpack.renderer.config.js",
-    "postinstall": "npm run lint:fix",
+    "postinstall": "yarn run lint:fix",
     "spec": "NODE_ENV=test jest -u --maxWorkers=3"
   },
   "build": {