diff --git a/Dockerfile b/Dockerfile
index 8c3408f..5013384 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,3 +1,3 @@
-FROM node:latest
+FROM node:lts-alpine3.9
 COPY entrypoint.sh /entrypoint.sh
 ENTRYPOINT ["/entrypoint.sh"]