diff --git a/Dockerfile b/Dockerfile
index 4fd130c..cb24738 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,23 +1,23 @@
 # Build stage
-FROM python:3.9-alpine AS builder
+FROM python:3.9-alpine3.16 AS builder
 
 # Set environment variables to avoid interactive prompts
 ENV PYTHONDONTWRITEBYTECODE=1 \
     PYTHONUNBUFFERED=1
-    
 
-# Configure apk to use a reliable mirror
-RUN echo "https://mirrors.tuna.tsinghua.edu.cn/alpine/v3.18/main" > /etc/apk/repositories && \
-    echo "https://mirrors.tuna.tsinghua.edu.cn/alpine/v3.18/community" >> /etc/apk/repositories
+# Configure apk to use Alpine 3.16 repositories
+RUN echo "https://dl-cdn.alpinelinux.org/alpine/v3.16/main" > /etc/apk/repositories && \
+    echo "https://dl-cdn.alpinelinux.org/alpine/v3.16/community" >> /etc/apk/repositories
 
-# Install build dependencies
-RUN apk add --no-cache \
+# Update package index and install build dependencies
+RUN apk update && apk add --no-cache \
     gcc \
     musl-dev \
     python3-dev \
     libffi-dev \
     openssl-dev \
-    make
+    make \
+    g++
 
 # Install MkDocs and plugins with exact versions
 RUN pip install --no-cache-dir \
@@ -39,7 +39,7 @@ COPY docs/ ./docs/
 RUN mkdocs build --strict
 
 # Runtime stage
-FROM python:3.9-alpine
+FROM python:3.9-alpine3.16
 
 # Set working directory
 WORKDIR /site