diff --git a/pyproject.toml b/pyproject.toml
index e748034..1041a3c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -45,7 +45,7 @@ dependencies = [
     # bentoml[io] includes pydantic, PIL, filetype, pandas and numpy
     # bentoml[grpc,grpc-reflection] include grpcio, grpcio-reflection
     "bentoml[io]>=1.1.2",
-    "attrs>=23.1.0",
+    "attrs==23.1.0",
     "cattrs>=23.1.0",
     # diffusers
     "diffusers[torch]>=0.19.3",