diff --git a/src/scriptform.py b/src/scriptform.py
index 66385d6..9b51b8f 100755
--- a/src/scriptform.py
+++ b/src/scriptform.py
@@ -200,7 +200,7 @@ class ScriptForm:
                                form['fields'],
                                script,
                                output=form.get('output', 'escaped'),
-                               submit_title=form.get('submit_title', None),
+                               submit_title=form.get('submit_title', 'Submit'),
                                allowed_users=form.get('allowed_users', None))
             )