diff --git a/pyproject.toml b/pyproject.toml
index a42bdafa1a..5500fe44aa 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -34,7 +34,7 @@ pydantic = "^2.5.0"
 jsonschema = ">=4.23.0,<5.0.0"
 numpydoc = {version = "*", optional = true} # used in utils.py
 
-uvicorn = {version = ">=0.32.1", optional = true}
+uvicorn = {version = ">=0.32.1,<1.0.0", optional = true}
 uvloop = {version = "^0.21.0", optional = true, markers="sys_platform != 'win32'"}
 gunicorn = {version = "^23.0.0", optional = true}
 fastapi = {version = ">=0.120.1", optional = true}