diff --git a/cvelib/cli.py b/cvelib/cli.py
index 383d14e..4825805 100644
--- a/cvelib/cli.py
+++ b/cvelib/cli.py
@@ -178,7 +178,7 @@ def wrapped(*args: Any, **kwargs: Any) -> Callable:
     return wrapped
 
 
-def print_error(msg: str, details: Optional[str]) -> None:
+def print_error(msg: str, details: str) -> None:
     click.secho("ERROR: ", bold=True, nl=False)
     click.echo(msg)
     if details: