diff --git a/src/affiliation.py b/src/affiliation.py
index 6d98fda..56134d1 100644
--- a/src/affiliation.py
+++ b/src/affiliation.py
@@ -57,7 +57,7 @@ def __init__(
         self.errors: dict = {}
 
     @classmethod
-    def _row_to_affiliation(cls, row: tuple) -> object:
+    def _row_to_affiliation(cls, row: tuple) -> 'Affiliation':
         """Convert table row to instance of affiliations object."""
         return cls(*row)