diff --git a/requirements.txt b/requirements.txt
index 63a5e8aa..d8597b3e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -10,4 +10,4 @@ transformers >= 4.34.0  # Required for Mistral.
 xformers == 0.0.22  # Required for Mistral.
 fastapi
 uvicorn[standard]
-pydantic < 2  # Required for OpenAI server.
+pydantic == 1.10.13  # Required for OpenAI server.