diff --git a/README b/README
index 6414558..62c53e9 100644
--- a/README
+++ b/README
@@ -148,13 +148,13 @@ of such hidden bugs, see commits [94d109f], [1142bf2], and [55c95a8].
 
 `slibtool` is distributed under a permissive [MIT license].
 
-[MIT license]:  http://git.foss21.org/slibtool/tree/COPYING.SLIBTOOL
+[#midipix]:     ircs://irc.libera.chat/#midipix
+[MIT license]:  https://git.foss21.org/slibtool/tree/COPYING.SLIBTOOL
+[CONTRIB]:      https://git.foss21.org/slibtool/tree/CONTRIB
 [libltdl]:      https://www.gnu.org/software/libtool/manual/html_node/Using-libltdl.html#Using-libltdl
-[dlopen()]:     http://pubs.opengroup.org/onlinepubs/9699919799/functions/dlopen.html
-[CONTRIB]:      http://git.foss21.org/slibtool/tree/CONTRIB
 [libtool]:      https://www.gnu.org/software/libtool/
-[#midipix]:     ircs://irc.libera.chat/#midipix
-[cparser]:      http://pp.ipd.kit.edu/git/cparser/
-[94d109f]:      http://git.foss21.org/slibtool/commit/?id=94d109fa418c024c214a50d645624e2e2935e6d1
-[1142bf2]:      http://git.foss21.org/slibtool/commit/?id=1142bf2e13f411cf967c1ed8b4060d7829eb13bb
-[55c95a8]:      http://git.foss21.org/slibtool/commit/?id=55c95a829928ae9f053678a58a2145276cad9c08
+[cparser]:      https://pp.ipd.kit.edu/git/cparser/
+[dlopen()]:     https://pubs.opengroup.org/onlinepubs/9699919799/functions/dlopen.html
+[94d109f]:      https://git.foss21.org/slibtool/commit/?id=94d109fa418c024c214a50d645624e2e2935e6d1
+[1142bf2]:      https://git.foss21.org/slibtool/commit/?id=1142bf2e13f411cf967c1ed8b4060d7829eb13bb
+[55c95a8]:      https://git.foss21.org/slibtool/commit/?id=55c95a829928ae9f053678a58a2145276cad9c08