diff --git a/pyproject.toml b/pyproject.toml
index 210fdf3..a0166cd 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -25,3 +25,4 @@ path = "src/cthulhu/__init__.py"
 
 [tool.hatch.build.targets.wheel]
 packages = ["src/cthulhu"]
+include = ["src/cthulhu/*.ui"]