diff --git a/pyproject.toml b/pyproject.toml
index 13fe3ec2eb..0799bcd7e0 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -162,7 +162,7 @@ values = [
 	"stable",
 ]
 
-[tool.bumpversion.part.devnum]
+[tool.bumpversion.parts.devnum]
 
 [[tool.bumpversion.files]]
 filename = "setup.py"