diff --git a/rtengine/refreshmap.h b/rtengine/refreshmap.h
index 39c80feef..05a8f7f44 100644
--- a/rtengine/refreshmap.h
+++ b/rtengine/refreshmap.h
@@ -14,7 +14,7 @@
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License
- *  along with RawTherapee.  If not, see <http://www.gnu.org/licenses/>.
+ *  along with RawTherapee.  If not, see <https://www.gnu.org/licenses/>.
  */
 #pragma once