diff --git a/Dockerfile.arm b/Dockerfile.arm
index 574274bca..cfede150c 100644
--- a/Dockerfile.arm
+++ b/Dockerfile.arm
@@ -4,6 +4,10 @@ USER  root
 WORKDIR /ragflow
 
 COPY requirements_arm.txt /ragflow/requirements.txt
+
+
+RUN pip install nltk --default-timeout=10000
+
 RUN pip install -i https://mirrors.aliyun.com/pypi/simple/ --default-timeout=1000 -r requirements.txt &&\
 python -c "import nltk;nltk.download('punkt');nltk.download('wordnet')"
 
@@ -31,4 +35,4 @@ ADD docker/entrypoint.sh ./entrypoint.sh
 ADD docker/.env ./
 RUN chmod +x ./entrypoint.sh
 
-ENTRYPOINT ["./entrypoint.sh"]
\ No newline at end of file
+ENTRYPOINT ["./entrypoint.sh"]