diff --git a/src/adtl/autoparser/create_mapping.py b/src/adtl/autoparser/create_mapping.py
index af359ec..e469bb2 100644
--- a/src/adtl/autoparser/create_mapping.py
+++ b/src/adtl/autoparser/create_mapping.py
@@ -2,6 +2,8 @@
 Create draft intermediate mapping in CSV from source dataset to target dataset
 """
 
+from __future__ import annotations
+
 import argparse
 import warnings
 from pathlib import Path
diff --git a/src/adtl/autoparser/dict_writer.py b/src/adtl/autoparser/dict_writer.py
index cb9e380..93d3f2d 100644
--- a/src/adtl/autoparser/dict_writer.py
+++ b/src/adtl/autoparser/dict_writer.py
@@ -2,6 +2,8 @@
 Infer a data dictionary from a dataset.
 """
 
+from __future__ import annotations
+
 import argparse
 from pathlib import Path
 
diff --git a/src/adtl/autoparser/make_toml.py b/src/adtl/autoparser/make_toml.py
index 7a7edb9..cf0c43c 100644
--- a/src/adtl/autoparser/make_toml.py
+++ b/src/adtl/autoparser/make_toml.py
@@ -2,6 +2,8 @@
 Generate TOML parser from intermediate CSV file
 """
 
+from __future__ import annotations
+
 import argparse
 import json
 import logging