diff --git a/Dockerfile b/Dockerfile
index 527fbf6..d4fad22 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -4,7 +4,10 @@ WORKDIR /app
 ENV PYTHONDONTWRITEBYTECODE=1 \
     PYTHONUNBUFFERED=1 \
     TZ=Asia/Shanghai
-RUN apt-get update && apt-get install -y --no-install-recommends tzdata && \
+RUN sed -i 's|deb.debian.org|mirrors.cloud.tencent.com|g' /etc/apt/sources.list && \
+    sed -i 's|security.debian.org|mirrors.cloud.tencent.com|g' /etc/apt/sources.list && \
+    apt-get update -o Acquire::Retries=3 -o Acquire::http::Timeout=30 && \
+    apt-get install -y --no-install-recommends tzdata && \
     ln -fs /usr/share/zoneinfo/Asia/Shanghai /etc/localtime && dpkg-reconfigure -f noninteractive tzdata && \
     rm -rf /var/lib/apt/lists/*
 COPY backend/requirements.txt .