diff --git a/build/debian/copyright b/build/debian/copyright
index 72e531d7007..a5832aa7754 100644
--- a/build/debian/copyright
+++ b/build/debian/copyright
@@ -52,7 +52,7 @@ License: GPL-3+
  details.
  .
  You should have received a copy of the GNU General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>.
+ along with this program. If not, see <https://www.gnu.org/licenses/>.
  .
  On Debian systems, the full text of the GNU General Public
  License version 3 can be found in the file
@@ -98,7 +98,7 @@ License: GPL-2+
  GNU General Public License for more details.
  .
  You should have received a copy of the GNU General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>.
+ along with this program. If not, see <https://www.gnu.org/licenses/>.
  .
  On Debian systems, the complete text of the GNU General Public License
  can be found in /usr/share/common-licenses/GPL-2 file.
@@ -192,7 +192,7 @@ License: GPL-2+
  details.
  .
  You should have received a copy of the GNU General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>.
+ along with this program. If not, see <https://www.gnu.org/licenses/>.
  .
  On Debian systems, the full text of the GNU General Public
  License version 2 can be found in the file
@@ -212,7 +212,7 @@ License: LGPL-2.1+
  Lesser General Public License for more details.
  .
  You should have received a copy of the GNU Lesser General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>.
+ along with this program. If not, see <https://www.gnu.org/licenses/>.
  .
  On Debian systems, the full text of the GNU Lesser General Public
  License version 2.1 can be found in the file
@@ -236,7 +236,7 @@ License: GPL-2+ or MIT
  details.
  .
  You should have received a copy of the GNU General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>.
+ along with this program. If not, see <https://www.gnu.org/licenses/>.
  .
  On Debian systems, the full text of the GNU General Public
  License version 2 can be found in the file
@@ -291,7 +291,7 @@ License: GPL-2+
  details.
  .
  You should have received a copy of the GNU General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>.
+ along with this program. If not, see <https://www.gnu.org/licenses/>.
  .
  On Debian systems, the full text of the GNU General Public
  License version 2 can be found in the file
@@ -311,7 +311,7 @@ License: LGPL-2.1+
  Lesser General Public License for more details.
  .
  You should have received a copy of the GNU Lesser General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>.
+ along with this program. If not, see <https://www.gnu.org/licenses/>.
  .
  On Debian systems, the full text of the GNU Lesser General Public
  License version 2.1 can be found in the file
@@ -358,7 +358,7 @@ License: LGPL-2.1+
  Lesser General Public License for more details.
  .
  You should have received a copy of the GNU Lesser General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>.
+ along with this program. If not, see <https://www.gnu.org/licenses/>.
  .
  On Debian systems, the full text of the GNU Lesser General Public
  License version 2.1 can be found in the file
@@ -378,7 +378,7 @@ License: LGPL-3.0+
  See the GNU Lesser General Public License for more details.
  .
  You should have received a copy of the GNU Lesser General Public License
- along with TCPDF. If not, see <http://www.gnu.org/licenses/>.
+ along with TCPDF. If not, see <https://www.gnu.org/licenses/>.
  .
  On Debian systems, the complete text of the GNU Lesser General
  Public License version 3 can be found in "/usr/share/common-licenses/LGPL-3".