diff --git a/Pipfile b/Pipfile
index edb11ce..34086c8 100644
--- a/Pipfile
+++ b/Pipfile
@@ -5,7 +5,7 @@ name = "pypi"
 
 [packages]
 fastapi = "*"
-pydantic = "~=1.9.0a2"
+pydantic = "==1.9.0a2"
 httptools = "*"
 httpx = "*"
 uvicorn = "*"