diff --git a/Dockerfile b/Dockerfile
index 4f898fb..407d748 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -14,7 +14,6 @@ RUN --mount=type=cache,target=/var/cache/apk,id=apk-cache-$TARGETARCH$TARGETVARI
     <<EOS
 set -ex
 pip config set global.index-url https://pypi.tuna.tsinghua.edu.cn/simple
-apk update
 apk add --no-cache \
   gcc libc-dev python3-dev \
   libpq libpq-dev \
@@ -22,7 +21,7 @@ apk add --no-cache \
   zlib zlib-dev \
   freetype freetype-dev \
   supervisor openssl nginx curl unzip
-pip install -r /app/deploy/requirements.txt
+pip install --no-cache-dir -r /app/deploy/requirements.txt
 apk del gcc libc-dev python3-dev libpq-dev libjpeg-turbo-dev zlib-dev freetype-dev
 EOS
 
@@ -30,6 +29,7 @@ COPY ./ /app/
 RUN mkdir -p /app/dist/
 RUN chmod -R u=rwX,go=rX ./ && chmod +x ./deploy/entrypoint.sh
 
-HEALTHCHECK --interval=5s CMD [ "/usr/local/bin/python3", "/app/deploy/health_check.py" ]
+HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
+  CMD python3 /app/deploy/health_check.py
 EXPOSE 8000
 ENTRYPOINT [ "/app/deploy/entrypoint.sh" ]
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