diff --git a/requirements.txt b/requirements.txt
index a28fa4a..f686f0a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,8 +1,8 @@
 line-bot-sdk
 fastapi
 uvicorn[standard]
-langchain
-embedchain
+langchain==0.0.303
+embedchain==0.0.92
 openai==0.28.1
-pydantic
+pydantic==1.10.10
 embedchain[dataloaders]