diff --git a/pyproject.toml b/pyproject.toml
index cbf0184..4d4f410 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -113,3 +113,13 @@ src = "gf180/__init__.py"
 
 [[tool.tbump.file]]
 src = "gf180/klayout/grain.xml"
+
+[tool.tbump.version]
+current = "0.0.3"
+regex = '''
+  (?P<major>\d+)
+  \.
+  (?P<minor>\d+)
+  \.
+  (?P<patch>\d+)
+  '''