diff --git a/dangerzone/cli.py b/dangerzone/cli.py
index e35c681..f617bfd 100644
--- a/dangerzone/cli.py
+++ b/dangerzone/cli.py
@@ -38,6 +38,7 @@ def print_header(s: str) -> None:
     type=click.UNPROCESSED,
     callback=args.validate_input_filenames,
 )
+@click.version_option(version=get_version(), message="%(version)s")
 @errors.handle_document_errors
 def cli_main(
     output_filename: Optional[str],
diff --git a/dangerzone/gui/__init__.py b/dangerzone/gui/__init__.py
index 4587839..5c0a7ca 100644
--- a/dangerzone/gui/__init__.py
+++ b/dangerzone/gui/__init__.py
@@ -13,7 +13,7 @@ from PySide2 import QtCore, QtGui, QtWidgets
 
 from .. import args, errors
 from ..document import Document
-from ..util import get_resource_path
+from ..util import get_resource_path, get_version
 from .logic import DangerzoneGui
 from .main_window import MainWindow
 
@@ -55,6 +55,7 @@ class Application(QtWidgets.QApplication):
     type=click.UNPROCESSED,
     callback=args.validate_input_filenames,
 )
+@click.version_option(version=get_version(), message="%(version)s")
 @errors.handle_document_errors
 def gui_main(filenames: Optional[List[str]]) -> bool:
     setup_logging()