diff --git a/PyTeX/build/build/relative_path.py b/PyTeX/build/build/relative_path.py
index 044d671..baa4f7c 100644
--- a/PyTeX/build/build/relative_path.py
+++ b/PyTeX/build/build/relative_path.py
@@ -54,7 +54,7 @@ class RelativePath:
         return self._root_dir
 
     @property
-    def relative_path(self):
+    def relative_path(self) -> Path:
         try:
             return self.relative_to(self._root_dir)
         except ValueError as e: