diff --git a/pyproject.toml b/pyproject.toml
index 512c8ed..c41882e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -31,6 +31,7 @@ openai-agents = ">=0.1.0"
 requests = ">=2.28.0"
 httpx = {extras = ["socks"], version = ">=0.28.1"}
 typing-extensions = ">=4.9.0"
+pydantic = ">=2.5.0,<3.0.0"
 
 [tool.poetry.urls]
 Repository = "https://github.com/VectifyAI/PageIndex"