diff --git a/pyproject.toml b/pyproject.toml
index 99bfb12..95acd53 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -14,7 +14,7 @@ include = [
 python = ">=3.9,<3.13"
 
 # CAD
-build123d = ">=0.8,<0.9"
+build123d = ">=0.9,<0.10"
 
 # Misc
 pygltflib = "^1.16.2"