diff --git a/ql/time/calendars/uzbekistan.cpp b/ql/time/calendars/uzbekistan.cpp
index a3dd87d733..a4319b7b91 100644
--- a/ql/time/calendars/uzbekistan.cpp
+++ b/ql/time/calendars/uzbekistan.cpp
@@ -10,7 +10,7 @@
  under the terms of the QuantLib license.  You should have received a
  copy of the license along with this program; if not, please email
  <quantlib-dev@lists.sf.net>. The license is also available online at
- <http://quantlib.org/license.shtml>.
+ <https://www.quantlib.org/license.shtml>.
 
  This program is distributed in the hope that it will be useful, but WITHOUT
  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS