diff --git a/Dockerfile b/Dockerfile
index 9d384545d..1bfac057a 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM openjdk:15-alpine
+FROM adoptopenjdk/openjdk15:alpine-slim
 RUN apk --no-cache add curl
 
 COPY nb/target/nb.jar nb.jar