diff --git a/tbump/config.py b/tbump/config.py
index a0014fd..84cedde 100644
--- a/tbump/config.py
+++ b/tbump/config.py
@@ -54,7 +54,7 @@ def __init__(self, project_path: Path, path: Path, doc: TOMLDocument):
 
     @property
     def relative_path(self) -> Path:
-        return self.path.relative_to(self.project_path)
+        return self.project_path / self.path
 
     def print_self(self) -> None:
         from tbump.cli import print_diff