diff --git a/npm/Dockerfile b/npm/Dockerfile
index a3286aab69..2f40171bb3 100644
--- a/npm/Dockerfile
+++ b/npm/Dockerfile
@@ -1,5 +1,5 @@
 # Use a minimal image as a parent image
-FROM ubuntu:focal
+FROM ubuntu:bionic-20200526
 ARG NPM_BUILD_DIR
 
 # Install dependencies.