diff --git a/corrlib/toml.py b/corrlib/toml.py
index 0004a4e..349d304 100644
--- a/corrlib/toml.py
+++ b/corrlib/toml.py
@@ -45,7 +45,7 @@ def check_measurement_data(measurements: dict, code: str) -> None:
     return
 
 
-def import_tomls(path: str, files: str, copy_files: bool=True) -> None:
+def import_tomls(path: str, files: list[str], copy_files: bool=True) -> None:
     for file in files:
         import_toml(path, file, copy_files)