diff --git a/Dockerfile b/Dockerfile
index eb8e132..7b10544 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,9 +1,6 @@
 FROM cloudron/base:4.2.0@sha256:46da2fffb36353ef714f97ae8e962bd2c212ca091108d768ba473078319a47f4
 
-
-RUN apt-get update && \
-    apt-get install --no-install-recommends -y \
-    libapache2-mod-auth-openidc
+RUN apt-get update && apt-get install --no-install-recommends -y libapache2-mod-auth-openidc && rm -rf /var/cache/apt /var/lib/apt/lists
 
 RUN mkdir -p /app/code
 WORKDIR /app/code