diff --git a/docker/Dockerfile.agent b/docker/Dockerfile.agent
index 096eacba..f2e04e88 100644
--- a/docker/Dockerfile.agent
+++ b/docker/Dockerfile.agent
@@ -26,7 +26,7 @@ RUN --mount=type=cache,target=/go/pkg/mod \
 RUN apk add --no-cache bash curl \
     && bash scripts/fetch-agent-geoip-mmdb.sh
 
-FROM openresty/openresty:alpine
+FROM openresty/openresty:alpine-slim
 
 RUN apk add --no-cache ca-certificates tzdata libmaxminddb su-exec libcap \
     && ln -sf /usr/lib/libmaxminddb.so.0 /usr/lib/libmaxminddb.so \
diff --git a/docs/changelog/index.md b/docs/changelog/index.md
index 1581e76a..294e81d7 100644
--- a/docs/changelog/index.md
+++ b/docs/changelog/index.md
@@ -10,6 +10,9 @@ sidebar: false
 
 ## [Unreleased]
 
+### ⚡ 优化
+- 优化 openflare-agent Docker 镜像体积：基础镜像切换为 `openresty/openresty:alpine-slim`，使用 BuildKit 原生 `--chown`/`--chmod` 消除 GeoIP MMDB 冗余层并在构建中清理 Perl 依赖，镜像总体积从 ~500MB+ 缩减至约 150MB。
+
 ## [v3.5.5] - 2026-09-19
 
 ### 🛠 修复