diff --git a/Dockerfile b/Dockerfile
index f9cf3024..ad2c9117 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,6 +1,9 @@
-FROM debian:12
+FROM debian:13-slim
 
-RUN apt update && apt install -y ca-certificates curl
+RUN apt-get update && \
+    apt-get upgrade -y && \
+    apt-get install -y --no-install-recommends ca-certificates curl && \
+    rm -rf /var/lib/apt/lists/*
 
 COPY chproxy /