diff --git a/Dockerfile b/Dockerfile
index 32f2b24..f24a907 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -5,7 +5,7 @@ WORKDIR /app
 
 COPY . .
 
-RUN yarn install
+RUN yarn set version 4.4.1 && yarn install
 
 ENV PORT=80
 ENTRYPOINT ["yarn", "run", "start"]