diff --git a/scripts-dev/sign_json.py b/scripts-dev/sign_json.py
index ffc91631cf..127cc195ca 100755
--- a/scripts-dev/sign_json.py
+++ b/scripts-dev/sign_json.py
@@ -30,7 +30,7 @@ def main():
     parser = argparse.ArgumentParser(
         description="""Adds a signature to a JSON object.
 
-Example usage: 
+Example usage:
 
     $ scripts-dev/sign_json.py -N test -k localhost.signing.key "{}"
     {"signatures":{"test":{"ed25519:a_ZnZh":"LmPnml6iM0iR..."}}}