diff --git a/Dockerfile b/Dockerfile
index f29bf6d..2d1b8a3 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -25,6 +25,14 @@ FROM docker.io/debian:trixie-slim AS final
 
 WORKDIR /app
 
+RUN rm -f /etc/apt/apt.conf.d/docker-clean \
+  && echo 'Binary::apt::APT::Keep-Downloaded-Packages "true";' > /etc/apt/apt.conf.d/keep-cache
+
+RUN --mount=type=cache,target=/var/cache/apt,sharing=locked \
+  --mount=type=cache,target=/var/lib/apt,sharing=locked \
+  apt-get update \
+  && apt-get install -y --no-install-recommends ca-certificates
+
 ARG \
   UID=1000 \
   GID=1000