diff --git a/docker/multistage/Dockerfile b/docker/multistage/Dockerfile
index 6a7550d..355f1c7 100644
--- a/docker/multistage/Dockerfile
+++ b/docker/multistage/Dockerfile
@@ -13,7 +13,7 @@ RUN cd ujetl && JAVA_HOME=/usr/lib/jvm/java-11 mvn -e package
 FROM openjdk:11 as runner
 LABEL maintainer="Derry Hamilton <derryh@rasilon.net>"
 
-RUN apt update && apt upgrade && apt install bash
+RUN apt update && apt upgrade -y && apt install -y bash
 
 RUN mkdir -p /usr/share/ujetl/lib/ /var/ujetl /etc/ujetl