diff --git a/Dockerfile b/Dockerfile
index 10aaa34..7ef25f5 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -5,6 +5,7 @@ ARG APP_PATH=/usr/local/bin/CBZOptimizer
 ENV USER=abc
 ENV CONFIG_FOLDER=/config
 ENV PUID=99
+ENV DEBIAN_FRONTEND=noninteractive
 
 RUN apt-get update && apt-get install -y --no-install-recommends adduser && \
     addgroup --system users && \
@@ -15,7 +16,8 @@ RUN apt-get update && apt-get install -y --no-install-recommends adduser && \
     --ingroup users \
     --disabled-password \
     "${USER}" && \
-    apt-get purge -y --auto-remove adduser
+    apt-get purge -y --auto-remove adduser && \
+    rm -rf /var/lib/apt/lists/*
 
 COPY ${TARGETPLATFORM}/CBZOptimizer ${APP_PATH}