diff --git a/Dockerfile b/Dockerfile
index c22756d0c75b4e45c4db87676649602ce7c43487..377380a84ddb0dde3ae2da3460a96fafffb86934 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -38,7 +38,6 @@ RUN apk -U upgrade \
     libidn \
     libpq \
     nodejs \
-    nodejs-npm \
     protobuf \
     su-exec \
     tini \
diff --git a/docker-compose.yml b/docker-compose.yml
index 55b419e98485a20154a1058589bbdf164266a0f0..4d9a6c40d190c615a1e08762ec9b8e30b8075c03 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -55,7 +55,7 @@ services:
     image: gargron/mastodon
     restart: always
     env_file: .env.production
-    command: npm run start
+    command: yarn start
     networks:
       - external_network
       - internal_network
diff --git a/package.json b/package.json
index abc13e1eab55e94232ca85efd89008a6d02d7e48..5b9ea7d37d0472b5c48f7cee8e264517fbd879ef 100644
--- a/package.json
+++ b/package.json
@@ -10,10 +10,9 @@
     "build:production": "cross-env RAILS_ENV=production ./bin/webpack",
     "manage:translations": "node ./config/webpack/translationRunner.js",
     "start": "node ./streaming/index.js",
-    "test": "npm run test:lint && npm run test:jest",
+    "test": "yarn run test:lint && yarn run test:jest",
     "test:lint": "eslint -c .eslintrc.yml --ext=js app/javascript/ config/webpack/ streaming/",
-    "test:jest": "cross-env NODE_ENV=test jest --coverage",
-    "postinstall": "npm rebuild node-sass"
+    "test:jest": "cross-env NODE_ENV=test jest --coverage"
   },
   "repository": {
     "type": "git",