diff --git a/Dockerfile b/Dockerfile
index 8a8cd59..f2f96d3 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -37,6 +37,10 @@ RUN pip install --no-cache-dir --prefix=/install \
 COPY evalscope.0.17.0/ ./evalscope
 RUN pip install --no-cache-dir --prefix=/install ./evalscope
 
+# ✅ 加这一段
+RUN pip install --no-cache-dir --prefix=/install nltk && \
+    python3 -m nltk.downloader -d /nltk_data punkt
+
 # 拷贝入口文件
 COPY gradio_ui.py .
 
@@ -48,6 +52,7 @@ ENV DEBIAN_FRONTEND=noninteractive
 
 # 拷贝构建阶段所有已安装包
 COPY --from=builder /install /usr/local
+COPY --from=builder /nltk_data /usr/local/nltk_data
 COPY --from=builder /build/gradio_ui.py /app/gradio_ui.py
 
 WORKDIR /app