diff --git a/_testdata/testdata_fetch.py b/_testdata/testdata_fetch.py
index 433395f..163a7d6 100755
--- a/_testdata/testdata_fetch.py
+++ b/_testdata/testdata_fetch.py
@@ -2,20 +2,19 @@
 #
 # testdata_fetch - Fetch openslide-testdata to local directory
 #
-# Copyright (c) 2010-2015,2022 Carnegie Mellon University
+# Copyright (c) 2010-2015, 2022 Carnegie Mellon University
 #
 # This program is free software; you can redistribute it and/or modify it
 # under the terms of version 2.1 of the GNU Lesser General Public License
 # as published by the Free Software Foundation.
 #
-# This library is distributed in the hope that it will be useful, but
+# 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 FOR A PARTICULAR PURPOSE.  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 this library; 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/>.
 #
 
 from __future__ import annotations
diff --git a/_testdata/testdata_index.py b/_testdata/testdata_index.py
index d0f49a9..452ff16 100755
--- a/_testdata/testdata_index.py
+++ b/_testdata/testdata_index.py
@@ -2,21 +2,20 @@
 #
 # testdata_index - Check metadata and build indexes for openslide-testdata
 #
-# Copyright (c) 2013-2015,2022 Carnegie Mellon University
+# Copyright (c) 2013-2015, 2022 Carnegie Mellon University
 # Copyright (c) 2016 Benjamin Gilbert
 #
 # This program is free software; you can redistribute it and/or modify it
 # under the terms of version 2.1 of the GNU Lesser General Public License
 # as published by the Free Software Foundation.
 #
-# This library is distributed in the hope that it will be useful, but
+# 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 FOR A PARTICULAR PURPOSE.  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 this library; 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/>.
 #
 
 from __future__ import annotations
diff --git a/demo/_synctiles.py b/demo/_synctiles.py
index 30fed0f..c8c3ab2 100755
--- a/demo/_synctiles.py
+++ b/demo/_synctiles.py
@@ -5,18 +5,17 @@
 # Copyright (c) 2010-2015 Carnegie Mellon University
 # Copyright (c) 2016-2023 Benjamin Gilbert
 #
-# This library is free software; you can redistribute it and/or modify it
+# This program is free software; you can redistribute it and/or modify it
 # under the terms of version 2.1 of the GNU Lesser General Public License
 # as published by the Free Software Foundation.
 #
-# This library is distributed in the hope that it will be useful, but
+# 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 FOR A PARTICULAR PURPOSE.  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 this library; 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/>.
 #
 
 from __future__ import annotations
diff --git a/demo/demo.css b/demo/demo.css
index de30be7..719a7e6 100644
--- a/demo/demo.css
+++ b/demo/demo.css
@@ -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 program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
 html {
diff --git a/demo/index.html b/demo/index.html
index 666bee3..59c8d70 100644
--- a/demo/index.html
+++ b/demo/index.html
@@ -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 program.  If not, see <https://www.gnu.org/licenses/>.
 -->
 
 <!doctype html>
diff --git a/license/index.md b/license/index.md
index 49d91a9..91ae2d2 100644
--- a/license/index.md
+++ b/license/index.md
@@ -18,11 +18,11 @@ General Public License for more details.
 ---
 
 ```
-		  GNU LESSER GENERAL PUBLIC LICENSE
-		       Version 2.1, February 1999
+                  GNU LESSER GENERAL PUBLIC LICENSE
+                       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.
 
@@ -30,7 +30,7 @@ General Public License for more details.
  as the successor of the GNU Library Public License, version 2, hence
  the version number 2.1.]
 
-			    Preamble
+                            Preamble
 
   The licenses for most software are designed to take away your
 freedom to share and change it.  By contrast, the GNU General Public
@@ -132,7 +132,7 @@ modification follow.  Pay close attention to the difference between a
 former contains code derived from the library, whereas the latter must
 be combined with the library in order to run.
 
-		  GNU LESSER GENERAL PUBLIC LICENSE
+                  GNU LESSER GENERAL PUBLIC LICENSE
    TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
 
   0. This License Agreement applies to any software library or other
@@ -452,7 +452,7 @@ decision will be guided by the two goals of preserving the free status
 of all derivatives of our free software and of promoting the sharing
 and reuse of software generally.
 
-			    NO WARRANTY
+                            NO WARRANTY
 
   15. BECAUSE THE LIBRARY IS LICENSED FREE OF CHARGE, THERE IS NO
 WARRANTY FOR THE LIBRARY, TO THE EXTENT PERMITTED BY APPLICABLE LAW.
@@ -475,7 +475,7 @@ FAILURE OF THE LIBRARY TO OPERATE WITH ANY OTHER SOFTWARE), EVEN IF
 SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
 DAMAGES.
 
-		     END OF TERMS AND CONDITIONS
+                     END OF TERMS AND CONDITIONS
 
            How to Apply These Terms to Your New Libraries
 
@@ -504,8 +504,7 @@ 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.
 
@@ -516,8 +515,8 @@ 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!
 ```