diff --git a/COPYING.LESSER b/COPYING.LESSER
index 4362b491..f6683e74 100644
--- a/COPYING.LESSER
+++ b/COPYING.LESSER
@@ -2,7 +2,7 @@
                        Version 2.1, February 1999
 
  Copyright (C) 1991, 1999 Free Software Foundation, Inc.
- 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ <https://fsf.org/>
  Everyone is permitted to copy and distribute verbatim copies
  of this license document, but changing it is not allowed.
 
@@ -484,8 +484,7 @@ convey the exclusion of warranty; and each file should have at least the
     Lesser General Public License for more details.
 
     You should have received a copy of the GNU Lesser General Public
-    License along with this library; if not, write to the Free Software
-    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+    License along with this library; if not, see <https://www.gnu.org/licenses/>.
 
 Also add information on how to contact you by electronic and paper mail.
 
@@ -496,7 +495,7 @@ necessary.  Here is a sample; alter the names:
   Yoyodyne, Inc., hereby disclaims all copyright interest in the
   library `Frob' (a library for tweaking knobs) written by James Random Hacker.
 
-  <signature of Ty Coon>, 1 April 1990
-  Ty Coon, President of Vice
+  <signature of Moe Ghoul>, 1 April 1990
+  Moe Ghoul, President of Vice
 
 That's all there is to it!
diff --git a/doc/jekyll_fix.py b/doc/jekyll_fix.py
index ef6555c5..d7fe8bf2 100644
--- a/doc/jekyll_fix.py
+++ b/doc/jekyll_fix.py
@@ -14,8 +14,7 @@
 # License for more details.
 #
 # You should have received a copy of the GNU Lesser General Public License
-# along with this library; if not, write to the Free Software Foundation,
-# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+# along with this library.  If not, see <https://www.gnu.org/licenses/>.
 #
 
 # Sphinx hardcodes that certain output paths have names starting with
diff --git a/examples/deepzoom/deepzoom_multiserver.py b/examples/deepzoom/deepzoom_multiserver.py
index 8142b6fe..0f43680e 100755
--- a/examples/deepzoom/deepzoom_multiserver.py
+++ b/examples/deepzoom/deepzoom_multiserver.py
@@ -15,8 +15,7 @@
 # License for more details.
 #
 # You should have received a copy of the GNU Lesser General Public License
-# along with this library; if not, write to the Free Software Foundation,
-# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+# along with this library.  If not, see <https://www.gnu.org/licenses/>.
 #
 
 from __future__ import annotations
diff --git a/examples/deepzoom/deepzoom_server.py b/examples/deepzoom/deepzoom_server.py
index fb9efbf1..9b30f207 100755
--- a/examples/deepzoom/deepzoom_server.py
+++ b/examples/deepzoom/deepzoom_server.py
@@ -15,8 +15,7 @@
 # License for more details.
 #
 # You should have received a copy of the GNU Lesser General Public License
-# along with this library; if not, write to the Free Software Foundation,
-# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+# along with this library.  If not, see <https://www.gnu.org/licenses/>.
 #
 
 from __future__ import annotations
diff --git a/examples/deepzoom/deepzoom_tile.py b/examples/deepzoom/deepzoom_tile.py
index b637095b..65b75b3e 100755
--- a/examples/deepzoom/deepzoom_tile.py
+++ b/examples/deepzoom/deepzoom_tile.py
@@ -15,8 +15,7 @@
 # License for more details.
 #
 # You should have received a copy of the GNU Lesser General Public License
-# along with this library; if not, write to the Free Software Foundation,
-# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+# along with this library.  If not, see <https://www.gnu.org/licenses/>.
 #
 
 """An example program to generate a Deep Zoom directory tree from a slide."""
diff --git a/openslide/__init__.py b/openslide/__init__.py
index 39b83fa9..d743780b 100644
--- a/openslide/__init__.py
+++ b/openslide/__init__.py
@@ -14,8 +14,7 @@
 # License for more details.
 #
 # You should have received a copy of the GNU Lesser General Public License
-# along with this library; if not, write to the Free Software Foundation,
-# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+# along with this library.  If not, see <https://www.gnu.org/licenses/>.
 #
 
 """A library for reading whole-slide images.
diff --git a/openslide/_convert.c b/openslide/_convert.c
index 6b0bf838..37d6e75a 100644
--- a/openslide/_convert.c
+++ b/openslide/_convert.c
@@ -13,8 +13,7 @@
  * License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public License
- * along with this library; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ * along with this library.  If not, see <https://www.gnu.org/licenses/>.
  */
 
 #include <Python.h>
diff --git a/openslide/_convert.pyi b/openslide/_convert.pyi
index c68c9781..03bf743b 100644
--- a/openslide/_convert.pyi
+++ b/openslide/_convert.pyi
@@ -13,8 +13,7 @@
 # License for more details.
 #
 # You should have received a copy of the GNU Lesser General Public License
-# along with this library; if not, write to the Free Software Foundation,
-# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+# along with this library.  If not, see <https://www.gnu.org/licenses/>.
 #
 
 from typing import Protocol
diff --git a/openslide/_version.py b/openslide/_version.py
index 7e95329b..9d37969a 100644
--- a/openslide/_version.py
+++ b/openslide/_version.py
@@ -13,8 +13,7 @@
 # License for more details.
 #
 # You should have received a copy of the GNU Lesser General Public License
-# along with this library; if not, write to the Free Software Foundation,
-# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+# along with this library.  If not, see <https://www.gnu.org/licenses/>.
 #
 
 """The openslide package version.
diff --git a/openslide/deepzoom.py b/openslide/deepzoom.py
index e712b0e6..fe690b44 100644
--- a/openslide/deepzoom.py
+++ b/openslide/deepzoom.py
@@ -13,8 +13,7 @@
 # License for more details.
 #
 # You should have received a copy of the GNU Lesser General Public License
-# along with this library; if not, write to the Free Software Foundation,
-# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+# along with this library.  If not, see <https://www.gnu.org/licenses/>.
 #
 
 """Support for Deep Zoom images.
diff --git a/openslide/lowlevel.py b/openslide/lowlevel.py
index 9aab42b8..6608033d 100644
--- a/openslide/lowlevel.py
+++ b/openslide/lowlevel.py
@@ -14,8 +14,7 @@
 # License for more details.
 #
 # You should have received a copy of the GNU Lesser General Public License
-# along with this library; if not, write to the Free Software Foundation,
-# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+# along with this library.  If not, see <https://www.gnu.org/licenses/>.
 #
 
 """
diff --git a/tests/common.py b/tests/common.py
index ca034195..aaa86f7f 100644
--- a/tests/common.py
+++ b/tests/common.py
@@ -13,8 +13,7 @@
 # License for more details.
 #
 # You should have received a copy of the GNU Lesser General Public License
-# along with this library; if not, write to the Free Software Foundation,
-# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+# along with this library.  If not, see <https://www.gnu.org/licenses/>.
 #
 
 from __future__ import annotations
diff --git a/tests/test_base.py b/tests/test_base.py
index 2ed9116e..9b3b3867 100644
--- a/tests/test_base.py
+++ b/tests/test_base.py
@@ -13,8 +13,7 @@
 # License for more details.
 #
 # You should have received a copy of the GNU Lesser General Public License
-# along with this library; if not, write to the Free Software Foundation,
-# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+# along with this library.  If not, see <https://www.gnu.org/licenses/>.
 #
 
 from __future__ import annotations
diff --git a/tests/test_deepzoom.py b/tests/test_deepzoom.py
index 1c67ab06..33b98688 100644
--- a/tests/test_deepzoom.py
+++ b/tests/test_deepzoom.py
@@ -13,8 +13,7 @@
 # License for more details.
 #
 # You should have received a copy of the GNU Lesser General Public License
-# along with this library; if not, write to the Free Software Foundation,
-# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+# along with this library.  If not, see <https://www.gnu.org/licenses/>.
 #
 
 from __future__ import annotations
diff --git a/tests/test_imageslide.py b/tests/test_imageslide.py
index 051263ee..dd3fe6f9 100644
--- a/tests/test_imageslide.py
+++ b/tests/test_imageslide.py
@@ -13,8 +13,7 @@
 # License for more details.
 #
 # You should have received a copy of the GNU Lesser General Public License
-# along with this library; if not, write to the Free Software Foundation,
-# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+# along with this library.  If not, see <https://www.gnu.org/licenses/>.
 #
 
 from __future__ import annotations
diff --git a/tests/test_openslide.py b/tests/test_openslide.py
index 2be656fd..26077efe 100644
--- a/tests/test_openslide.py
+++ b/tests/test_openslide.py
@@ -13,8 +13,7 @@
 # License for more details.
 #
 # You should have received a copy of the GNU Lesser General Public License
-# along with this library; if not, write to the Free Software Foundation,
-# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+# along with this library.  If not, see <https://www.gnu.org/licenses/>.
 #
 
 from __future__ import annotations