diff --git a/src/mijnbib/models.py b/src/mijnbib/models.py
index 97bb5ef..b457fbe 100644
--- a/src/mijnbib/models.py
+++ b/src/mijnbib/models.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from dataclasses import dataclass
 from datetime import date
 
diff --git a/src/mijnbib/parsers.py b/src/mijnbib/parsers.py
index 0db3a11..01bd8d3 100644
--- a/src/mijnbib/parsers.py
+++ b/src/mijnbib/parsers.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import logging
 import re
 import urllib.parse