diff --git a/include/opendht.h b/include/opendht.h
index 6f272cfc..98d3ece9 100644
--- a/include/opendht.h
+++ b/include/opendht.h
@@ -13,8 +13,7 @@
  *  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, write to the Free Software
- *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA.
+ *  along with this program. If not, see <https://www.gnu.org/licenses/>.
  */
 
 #pragma once
diff --git a/include/opendht/callbacks.h b/include/opendht/callbacks.h
index 6284e70f..7bbcc6b5 100644
--- a/include/opendht/callbacks.h
+++ b/include/opendht/callbacks.h
@@ -14,8 +14,7 @@
  *  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, write to the Free Software
- *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA.
+ *  along with this program. If not, see <https://www.gnu.org/licenses/>.
  */
 
 #pragma once
diff --git a/include/opendht/crypto.h b/include/opendht/crypto.h
index dcda08c8..8a1f86bd 100644
--- a/include/opendht/crypto.h
+++ b/include/opendht/crypto.h
@@ -13,8 +13,7 @@
  *  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, write to the Free Software
- *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA.
+ *  along with this program. If not, see <https://www.gnu.org/licenses/>.
  */
 
 #pragma once
diff --git a/include/opendht/default_types.h b/include/opendht/default_types.h
index 0c644b19..006b8ac9 100644
--- a/include/opendht/default_types.h
+++ b/include/opendht/default_types.h
@@ -13,8 +13,7 @@
  *  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, write to the Free Software
- *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA.
+ *  along with this program. If not, see <https://www.gnu.org/licenses/>.
  */
 
 #pragma once
diff --git a/include/opendht/dht.h b/include/opendht/dht.h
index 0f0357ee..0a8d90ae 100644
--- a/include/opendht/dht.h
+++ b/include/opendht/dht.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 this program. If not, see <http://www.gnu.org/licenses/>.
+ *  along with this program. If not, see <https://www.gnu.org/licenses/>.
  */
 
 #pragma once
diff --git a/include/opendht/dhtrunner.h b/include/opendht/dhtrunner.h
index ab49dbc5..0007c31a 100644
--- a/include/opendht/dhtrunner.h
+++ b/include/opendht/dhtrunner.h
@@ -14,8 +14,7 @@
  *  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, write to the Free Software
- *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA.
+ *  along with this program. If not, see <https://www.gnu.org/licenses/>.
  */
 
 #pragma once
diff --git a/include/opendht/indexation/pht.h b/include/opendht/indexation/pht.h
index eab3bb88..cbef73bf 100644
--- a/include/opendht/indexation/pht.h
+++ b/include/opendht/indexation/pht.h
@@ -15,7 +15,7 @@
  *  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/>.
  */
 
 #pragma once
diff --git a/include/opendht/infohash.h b/include/opendht/infohash.h
index cd24f638..5e07ba1c 100644
--- a/include/opendht/infohash.h
+++ b/include/opendht/infohash.h
@@ -13,8 +13,7 @@
  *  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, write to the Free Software
- *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA.
+ *  along with this program. If not, see <https://www.gnu.org/licenses/>.
  */
 
 #pragma once
diff --git a/include/opendht/log.h b/include/opendht/log.h
index c5b47bc9..2c69aede 100644
--- a/include/opendht/log.h
+++ b/include/opendht/log.h
@@ -14,8 +14,7 @@
  *  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, write to the Free Software
- *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA.
+ *  along with this program. If not, see <https://www.gnu.org/licenses/>.
  */
 
 #pragma once
diff --git a/include/opendht/log_enable.h b/include/opendht/log_enable.h
index 5c89c516..b55f5556 100644
--- a/include/opendht/log_enable.h
+++ b/include/opendht/log_enable.h
@@ -13,7 +13,7 @@
  *  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/>.
  */
 
 #pragma once
diff --git a/include/opendht/net.h b/include/opendht/net.h
index 9d74c538..180c4cf9 100644
--- a/include/opendht/net.h
+++ b/include/opendht/net.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 this program. If not, see <http://www.gnu.org/licenses/>.
+ *  along with this program. If not, see <https://www.gnu.org/licenses/>.
  */
 
 #pragma once
diff --git a/include/opendht/network_engine.h b/include/opendht/network_engine.h
index b99a80cc..53f90443 100644
--- a/include/opendht/network_engine.h
+++ b/include/opendht/network_engine.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 this program. If not, see <http://www.gnu.org/licenses/>.
+ *  along with this program. If not, see <https://www.gnu.org/licenses/>.
  */
 
 #pragma once
diff --git a/include/opendht/node.h b/include/opendht/node.h
index 826dab7e..7a2c9256 100644
--- a/include/opendht/node.h
+++ b/include/opendht/node.h
@@ -14,8 +14,7 @@
  *  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, write to the Free Software
- *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA.
+ *  along with this program. If not, see <https://www.gnu.org/licenses/>.
  */
 
 #pragma once
diff --git a/include/opendht/node_cache.h b/include/opendht/node_cache.h
index 471f5ad8..d18b7664 100644
--- a/include/opendht/node_cache.h
+++ b/include/opendht/node_cache.h
@@ -13,8 +13,7 @@
  *  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, write to the Free Software
- *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA.
+ *  along with this program. If not, see <https://www.gnu.org/licenses/>.
  */
 
 #pragma once
diff --git a/include/opendht/rate_limiter.h b/include/opendht/rate_limiter.h
index 3c0befa0..504c8934 100644
--- a/include/opendht/rate_limiter.h
+++ b/include/opendht/rate_limiter.h
@@ -13,7 +13,7 @@
  *  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/>.
  */
 
 #pragma once
diff --git a/include/opendht/request.h b/include/opendht/request.h
index cd61998d..0174e3b0 100644
--- a/include/opendht/request.h
+++ b/include/opendht/request.h
@@ -14,8 +14,7 @@
  *  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, write to the Free Software
- *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA.
+ *  along with this program. If not, see <https://www.gnu.org/licenses/>.
  */
 
 #pragma once
diff --git a/include/opendht/rng.h b/include/opendht/rng.h
index f4fff51e..ddaedaa7 100644
--- a/include/opendht/rng.h
+++ b/include/opendht/rng.h
@@ -13,8 +13,7 @@
  *  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, write to the Free Software
- *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA.
+ *  along with this program. If not, see <https://www.gnu.org/licenses/>.
  */
 
 #pragma once
diff --git a/include/opendht/routing_table.h b/include/opendht/routing_table.h
index b672e6ef..e71149b6 100644
--- a/include/opendht/routing_table.h
+++ b/include/opendht/routing_table.h
@@ -14,8 +14,7 @@
  *  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, write to the Free Software
- *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA.
+ *  along with this program. If not, see <https://www.gnu.org/licenses/>.
  */
 
 #pragma once
diff --git a/include/opendht/scheduler.h b/include/opendht/scheduler.h
index 22e6da14..8f61d4cd 100644
--- a/include/opendht/scheduler.h
+++ b/include/opendht/scheduler.h
@@ -14,8 +14,7 @@
  *  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, write to the Free Software
- *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA.
+ *  along with this program. If not, see <https://www.gnu.org/licenses/>.
  */
 
 
diff --git a/include/opendht/securedht.h b/include/opendht/securedht.h
index 08aea2e0..acae729f 100644
--- a/include/opendht/securedht.h
+++ b/include/opendht/securedht.h
@@ -14,19 +14,7 @@
  *  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, write to the Free Software
- *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA.
- *
- *  Additional permission under GNU GPL version 3 section 7:
- *
- *  If you modify this program, or any covered work, by linking or
- *  combining it with the OpenSSL project's OpenSSL library (or a
- *  modified version of that library), containing parts covered by the
- *  terms of the OpenSSL or SSLeay licenses, Savoir-faire Linux Inc.
- *  grants you additional permission to convey the resulting work.
- *  Corresponding Source for a non-source form of such a combination
- *  shall include the source code for the parts of OpenSSL used as well
- *  as that of the covered work.
+ *  along with this program. If not, see <https://www.gnu.org/licenses/>.
  */
 
 #pragma once
diff --git a/include/opendht/sockaddr.h b/include/opendht/sockaddr.h
index 12c4d570..d2b814d1 100644
--- a/include/opendht/sockaddr.h
+++ b/include/opendht/sockaddr.h
@@ -13,7 +13,7 @@
  *  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/>.
  */
 
 #pragma once
diff --git a/include/opendht/utils.h b/include/opendht/utils.h
index 1e74c3dd..054b7be4 100644
--- a/include/opendht/utils.h
+++ b/include/opendht/utils.h
@@ -13,7 +13,7 @@
  *  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/>.
  */
 
 #pragma once
diff --git a/include/opendht/value.h b/include/opendht/value.h
index b9dad225..3385f0da 100644
--- a/include/opendht/value.h
+++ b/include/opendht/value.h
@@ -14,8 +14,7 @@
  *  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, write to the Free Software
- *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA.
+ *  along with this program. If not, see <https://www.gnu.org/licenses/>.
  */
 
 #pragma once
diff --git a/python/opendht.pyx b/python/opendht.pyx
index 1ce761a0..f87a24da 100644
--- a/python/opendht.pyx
+++ b/python/opendht.pyx
@@ -25,7 +25,7 @@
 # GNU General Public License for more details.
 #
 # You should have received a copy of the GNU General Public License
-# along with OpenDHT Python Wrapper. If not, see <http://www.gnu.org/licenses/>.
+# along with OpenDHT Python Wrapper. If not, see <https://www.gnu.org/licenses/>.
 
 from libcpp.map cimport map as map
 from libcpp cimport bool
diff --git a/python/opendht_cpp.pxd b/python/opendht_cpp.pxd
index 0e5bc732..4ae8130e 100644
--- a/python/opendht_cpp.pxd
+++ b/python/opendht_cpp.pxd
@@ -13,7 +13,7 @@
 # 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/>.
 
 from libc.stdint cimport *
 from libcpp cimport bool
diff --git a/python/setup.py.in b/python/setup.py.in
index b2d94c22..94f8078e 100644
--- a/python/setup.py.in
+++ b/python/setup.py.in
@@ -18,7 +18,7 @@
 #    GNU General Public License for more details.
 #
 #    You should have received a copy of the GNU General Public License
-#    along with OpenDHT Python Wrapper. If not, see <http://www.gnu.org/licenses/>.
+#    along with OpenDHT Python Wrapper. If not, see <https://www.gnu.org/licenses/>.
 #
 
 from setuptools import setup, Extension
diff --git a/python/tools/pingpong.py b/python/tools/pingpong.py
index bff328e5..b7db74e5 100755
--- a/python/tools/pingpong.py
+++ b/python/tools/pingpong.py
@@ -1,5 +1,5 @@
 #!/usr/bin/env python3
-# Copyright (c) 2015-2016 Savoir-faire Linux Inc.
+# Copyright (c) 2015-2017 Savoir-faire Linux Inc.
 # Author: Adrien Béraud <adrien.beraud@savoirfairelinux.com>
 #
 # This program is free software; you can redistribute it and/or modify
@@ -13,7 +13,7 @@
 # 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/>.
 
 import opendht as dht
 import time
diff --git a/src/crypto.cpp b/src/crypto.cpp
index 638d4b4c..7faf74c3 100644
--- a/src/crypto.cpp
+++ b/src/crypto.cpp
@@ -13,8 +13,7 @@
  *  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, write to the Free Software
- *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA.
+ *  along with this program. If not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "crypto.h"
diff --git a/src/default_types.cpp b/src/default_types.cpp
index df747bab..847d4a6a 100644
--- a/src/default_types.cpp
+++ b/src/default_types.cpp
@@ -13,8 +13,7 @@
  *  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, write to the Free Software
- *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA.
+ *  along with this program. If not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "default_types.h"
diff --git a/src/dhtrunner.cpp b/src/dhtrunner.cpp
index f3b64b6a..d8903274 100644
--- a/src/dhtrunner.cpp
+++ b/src/dhtrunner.cpp
@@ -14,8 +14,7 @@
  *  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, write to the Free Software
- *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA.
+ *  along with this program. If not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "dhtrunner.h"
diff --git a/src/indexation/pht.cpp b/src/indexation/pht.cpp
index e443a698..b8300c91 100644
--- a/src/indexation/pht.cpp
+++ b/src/indexation/pht.cpp
@@ -15,7 +15,7 @@
  *  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/>.
  */
 
 #include "indexation/pht.h"
diff --git a/src/infohash.cpp b/src/infohash.cpp
index f25fd5ea..d3f8345b 100644
--- a/src/infohash.cpp
+++ b/src/infohash.cpp
@@ -13,8 +13,7 @@
  *  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, write to the Free Software
- *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA.
+ *  along with this program. If not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "infohash.h"
diff --git a/src/log.cpp b/src/log.cpp
index 5488b3ef..74ec0115 100644
--- a/src/log.cpp
+++ b/src/log.cpp
@@ -14,8 +14,7 @@
  *  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, write to the Free Software
- *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA.
+ *  along with this program. If not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "log.h"
diff --git a/src/network_engine.cpp b/src/network_engine.cpp
index 6b1c9822..81895be9 100644
--- a/src/network_engine.cpp
+++ b/src/network_engine.cpp
@@ -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 this program. If not, see <http://www.gnu.org/licenses/>.
+ *  along with this program. If not, see <https://www.gnu.org/licenses/>.
  */
 
 
diff --git a/src/node.cpp b/src/node.cpp
index 6a96401f..1c482af2 100644
--- a/src/node.cpp
+++ b/src/node.cpp
@@ -14,8 +14,7 @@
  *  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, write to the Free Software
- *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA.
+ *  along with this program. If not, see <https://www.gnu.org/licenses/>.
  */
 
 
diff --git a/src/node_cache.cpp b/src/node_cache.cpp
index 3d98f284..4bc51215 100644
--- a/src/node_cache.cpp
+++ b/src/node_cache.cpp
@@ -13,8 +13,7 @@
  *  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, write to the Free Software
- *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA.
+ *  along with this program. If not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "node_cache.h"
diff --git a/src/rng.cpp b/src/rng.cpp
index 146902f0..473569e2 100644
--- a/src/rng.cpp
+++ b/src/rng.cpp
@@ -13,8 +13,7 @@
  *  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, write to the Free Software
- *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA.
+ *  along with this program. If not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "rng.h"
diff --git a/src/securedht.cpp b/src/securedht.cpp
index 7642fec9..d2c36008 100644
--- a/src/securedht.cpp
+++ b/src/securedht.cpp
@@ -14,8 +14,7 @@
  *  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, write to the Free Software
- *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA.
+ *  along with this program. If not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "securedht.h"
diff --git a/src/utils.cpp b/src/utils.cpp
index 7874f8fe..afc09f04 100644
--- a/src/utils.cpp
+++ b/src/utils.cpp
@@ -13,8 +13,7 @@
  *  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, write to the Free Software
- *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA.
+ *  along with this program. If not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "utils.h"
diff --git a/src/value.cpp b/src/value.cpp
index 68ee10fb..c96f444a 100644
--- a/src/value.cpp
+++ b/src/value.cpp
@@ -14,8 +14,7 @@
  *  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, write to the Free Software
- *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA.
+ *  along with this program. If not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "value.h"
diff --git a/tools/dhtchat.cpp b/tools/dhtchat.cpp
index a6fb1459..8e48723f 100644
--- a/tools/dhtchat.cpp
+++ b/tools/dhtchat.cpp
@@ -14,8 +14,7 @@
  *  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, write to the Free Software
- *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA.
+ *  along with this program. If not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "tools_common.h"
diff --git a/tools/dhtnode.cpp b/tools/dhtnode.cpp
index e2ea4709..5e989ad9 100644
--- a/tools/dhtnode.cpp
+++ b/tools/dhtnode.cpp
@@ -15,8 +15,7 @@
  *  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, write to the Free Software
- *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA.
+ *  along with this program. If not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "tools_common.h"
diff --git a/tools/dhtscanner.cpp b/tools/dhtscanner.cpp
index b01c19fa..f74464f8 100644
--- a/tools/dhtscanner.cpp
+++ b/tools/dhtscanner.cpp
@@ -14,8 +14,7 @@
  *  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, write to the Free Software
- *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA.
+ *  along with this program. If not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "tools_common.h"
diff --git a/tools/tools_common.h b/tools/tools_common.h
index c1801d53..291e6495 100644
--- a/tools/tools_common.h
+++ b/tools/tools_common.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 this program. If not, see <http://www.gnu.org/licenses/>.
+ *  along with this program. If not, see <https://www.gnu.org/licenses/>.
  */
 
 // Common utility methods used by C++ OpenDHT tools.