diff --git a/apps/language_models/langchain/langchain_requirements.txt b/apps/language_models/langchain/langchain_requirements.txt
index 6b5f9f0264..9315c54278 100644
--- a/apps/language_models/langchain/langchain_requirements.txt
+++ b/apps/language_models/langchain/langchain_requirements.txt
@@ -1,3 +1,6 @@
+-f https://download.pytorch.org/whl/nightly/cpu/torch_nightly.html
+--pre
+
 # for generate (gradio server) and finetune
 datasets==2.13.0
 sentencepiece==0.1.99