diff --git a/facefusion/exit_helper.py b/facefusion/exit_helper.py
index 9efd598..23da74a 100644
--- a/facefusion/exit_helper.py
+++ b/facefusion/exit_helper.py
@@ -13,7 +13,7 @@ def hard_exit(error_code : ErrorCode) -> None:
 	sys.exit(error_code)
 
 
-def signal_exit(signum : int, frame : FrameType):
+def signal_exit(signum : int, frame : FrameType) -> None:
 	graceful_exit(0)
 
 
diff --git a/facefusion/installer.py b/facefusion/installer.py
index a04faab..a363b06 100644
--- a/facefusion/installer.py
+++ b/facefusion/installer.py
@@ -32,7 +32,7 @@ def cli() -> None:
 	run(program)
 
 
-def signal_exit(signum : int, frame : FrameType):
+def signal_exit(signum : int, frame : FrameType) -> None:
 	sys.exit(0)