diff --git a/alib-build/Dockerfile b/alib-build/Dockerfile
index 403ab8e28e843dec6af405d0e5300a120fb23100..548580a2daccd6a2dc066179728231db58e9c1d1 100644
--- a/alib-build/Dockerfile
+++ b/alib-build/Dockerfile
@@ -1,6 +1,6 @@
 FROM amd64/debian:testing-slim
 
-RUN apt-get update \
-    && apt-get upgrade \
+RUN apt-get update -y  \
+    && apt-get upgrade -y \
 	&& apt-get install -y build-essential cmake make python3 libcppunit-dev libxml2-dev libtclap-dev libreadline-dev qtbase5-dev graphviz-dev libjsoncpp-dev clang-7 \
-	&& apt-get clean
+	&& apt-get clean -y