diff --git a/app/broadcast_message/broadcast_message_schema.py b/app/broadcast_message/broadcast_message_schema.py
index 4b67e0ee7..b88340d2b 100644
--- a/app/broadcast_message/broadcast_message_schema.py
+++ b/app/broadcast_message/broadcast_message_schema.py
@@ -15,7 +15,6 @@ create_broadcast_message_schema = {
         'finishes_at': {'type': 'string', 'format': 'datetime'},
         'areas': {'type': 'object'},
         'areas_2': {'type': 'object'},
-        'simple_polygons': {"type": "array", "items": {"type": "array"}},
         'content': {'type': 'string', 'minLength': 1},
         'reference': {'type': 'string', 'minLength': 1, 'maxLength': 255},
     },
@@ -44,7 +43,6 @@ update_broadcast_message_schema = {
         'finishes_at': {'type': 'string', 'format': 'datetime'},
         'areas': {'type': 'object'},
         'areas_2': {'type': 'object'},
-        'simple_polygons': {"type": "array", "items": {"type": "array"}},
     },
     'required': [],
     'additionalProperties': False