diff --git a/help_to_heat/settings.py b/help_to_heat/settings.py
index 1c6dffb6..c4f060ac 100644
--- a/help_to_heat/settings.py
+++ b/help_to_heat/settings.py
@@ -258,6 +258,8 @@ def show_toolbar(request):
 
 TOTP_ISSUER = "Help to Heat Supplier Portal"
 
+CSRF_TRUSTED_ORIGINS = [BASE_URL]
+
 if not DEBUG:
     SESSION_COOKIE_SECURE = True
     SESSION_EXPIRE_AT_BROWSER_CLOSE = True