diff --git a/pyproject.toml b/pyproject.toml
index cd026f73a..be6e425f9 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -30,7 +30,7 @@ dependencies = [
     "mediapy>=1.1.0",
     "msgpack>=1.0.4",
     "msgpack_numpy>=0.4.8",
-    "nerfacc==0.5.2",
+    "nerfacc==0.5.1",
     "open3d>=0.16.0",
     "opencv-python==4.6.0.66",
     "Pillow>=9.3.0",