diff --git a/Dockerfile b/Dockerfile
index c6602bb6..9b982f81 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 FROM golang as builder
-RUN apt-get update && apt-get install upx
+RUN apt-get update && apt-get install -y upx
 ADD . /luet
 RUN cd /luet && make build-small