make headers even more secure
make headers even more secure

geometalab/drf-utm-zone-info,geometalab/osmaxx,geometalab/osmaxx,geometalab/osmaxx-frontend,geometalab/drf-utm-zone-info,geometalab/osmaxx-frontend,geometalab/osmaxx,geometalab/osmaxx,geometalab/osmaxx-frontend,geometalab/osmaxx-frontend