diff --git a/Dockerfile b/Dockerfile
index 7bc67d9..ed0e14a 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -2,7 +2,7 @@
 # build ui #
 ############
 
-FROM node:lts AS build-ui
+FROM node:18.16 AS build-ui
 
 # env setup
 WORKDIR /usr/local/src/advent22_ui