diff --git a/tools/pamusb-pinentry b/tools/pamusb-pinentry
index edf48f13..091270c8 100755
--- a/tools/pamusb-pinentry
+++ b/tools/pamusb-pinentry
@@ -1,4 +1,20 @@
 #!/usr/bin/env python3
+#
+# Copyright (c) 2024 Dhruva Sambrani <dhruvasambrani19@gmail.com>
+#
+# This file is part of the pam_usb project. pam_usb is free software;
+# you can redistribute it and/or modify it under the terms of the GNU General
+# Public License version 2, as published by the Free Software Foundation.
+#
+# pam_usb is distributed in the hope that it will be useful, but WITHOUT ANY
+# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+# FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
+# details.
+#
+# You should have received a copy of the GNU General Public License along with
+# this program; if not, write to the Free Software Foundation, Inc., 51 Franklin
+# Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
 import os
 import subprocess
 import getpass
@@ -19,4 +35,4 @@ if (isAuthenticated.returncode == 0):
             exit()
         print("OK")
 else:
-    subprocess.run(fallbackPinentryApp)
\ No newline at end of file
+    subprocess.run(fallbackPinentryApp)