diff --git a/.dockerignore b/.dockerignore
index 09d3015be..84fd34f8e 100644
--- a/.dockerignore
+++ b/.dockerignore
@@ -10,6 +10,7 @@ db/
 docker-compose.yml
 elasticsearch/
 node_modules/
+packages/*/node_modules
 redis/
 files/
 misskey-assets/
diff --git a/Dockerfile b/Dockerfile
index 5f8ac9289..7a80739e2 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -30,4 +30,4 @@ COPY . ./
 
 ENV NODE_ENV=production
 ENTRYPOINT ["/usr/bin/tini", "--"]
-CMD ["npm", "run", "migrateandstart"]
+CMD ["yarn", "run", "migrateandstart"]