diff --git a/doc/org/concepts.org b/doc/org/concepts.org
index 24156ddfd..ab59d75ce 100644
--- a/doc/org/concepts.org
+++ b/doc/org/concepts.org
@@ -54,7 +54,7 @@ Andersen's lecture notes]].
 
 In Spot, BDDs are one way to represent Boolean formulas, and in
 particular, they are used to labels the edges of [[#buchi][automata]]. Spot uses a
-customized version of [[http://sourceforge.net/projects/buddy/][the BuDDy library]] for manipulating BDDs.
+customized version of [[https://sourceforge.net/projects/buddy/][the BuDDy library]] for manipulating BDDs.
 
 * ω-word
    :PROPERTIES:
diff --git a/doc/org/ltlcross.org b/doc/org/ltlcross.org
index 693a2650c..c0c3a9600 100644
--- a/doc/org/ltlcross.org
+++ b/doc/org/ltlcross.org
@@ -101,7 +101,7 @@ No problem detected.
 =ltlcross= can only read four kinds of output:
   - Never claims (only if they are restricted to representing an
     automaton using =if=, =goto=, and =skip= statements) such as those
-    output by [[http://spinroot.com/][=spin=]], [[http://www.lsv.ens-cachan.fr/~gastin/ltl2ba/][=ltl2ba=]], [[http://sourceforge.net/projects/ltl3ba/][=ltl3ba=]], or =ltl2tgba --spin=.  The
+    output by [[http://spinroot.com/][=spin=]], [[http://www.lsv.ens-cachan.fr/~gastin/ltl2ba/][=ltl2ba=]], [[https://sourceforge.net/projects/ltl3ba/][=ltl3ba=]], or =ltl2tgba --spin=.  The
     newer syntax introduced by Spin 6.24, using =do= instead of =if=,
     is also supported.
   - [[http://www.tcs.hut.fi/Software/lbtt/doc/html/Format-for-automata.html][LBTT's format]], which supports generalized Büchi automata with
diff --git a/doc/org/ltldo.org b/doc/org/ltldo.org
index c83ad891b..1b5d4b481 100644
--- a/doc/org/ltldo.org
+++ b/doc/org/ltldo.org
@@ -19,7 +19,7 @@ any other tool.
 * Example: computing statistics for =ltl3ba=
 
 As a motivating example, consider a scenario where we want to run
-[[http://sourceforge.net/projects/ltl3ba/][=ltl3ba=]] on a set of 10 formulas stored in a file.  For each formula
+[[https://sourceforge.net/projects/ltl3ba/][=ltl3ba=]] on a set of 10 formulas stored in a file.  For each formula
 we would like to compute compute the number of states and edges in the
 Büchi automaton produced by =ltl3ba=.
 
diff --git a/python/ajax/trans.html b/python/ajax/trans.html
index 924719d20..74e2bb038 100644
--- a/python/ajax/trans.html
+++ b/python/ajax/trans.html
@@ -616,7 +616,7 @@ an identifier: <span class="formula">aUb</span> is an atomic proposition, unlike
 		</label><br>
 	      </div>
 	      <div id="tabs-tl3">
-		Use <a href="http://sourceforge.net/projects/ltl3ba/" id="ltl3ba-link">LTL3BA</a> to build:
+		Use <a href="https://sourceforge.net/projects/ltl3ba/" id="ltl3ba-link">LTL3BA</a> to build:
 		<label class="rtip" title="Stop LTL3BA once it has built a Transition-based Generalized Büchi Automaton.  Spot will take it from here and optionally apply more optimizations.">
 		  <INPUT id="ltl3ba-T" type="radio" name="lo" value="T" checked>
 		  a TGBA
diff --git a/tools/man2html.pl b/tools/man2html.pl
index a6e78a79b..84a0cc654 100755
--- a/tools/man2html.pl
+++ b/tools/man2html.pl
@@ -1,6 +1,6 @@
 #!/usr/bin/perl
 ## -*- coding: utf-8 -*-
-## Copyright (C) 2015 Laboratoire de Recherche et Développement de
+## Copyright (C) 2015, 2016 Laboratoire de Recherche et Développement de
 ## l'Epita (LRDE).
 ##
 ## This file is part of Spot, a model checking library.
@@ -42,7 +42,7 @@ while (my $file = readdir(DIR))
     my $html = `(echo '.HEAD <LINK REL="stylesheet" TYPE="text/css" HREF="../spot.css">'
                  echo '.HEAD <meta name="viewport" content="width=device-width, initial-scale=1">'
                  cat $file) | groff -Kutf8 -mandoc -Thtml - -P -r`;
-    $html =~ s|GNU GPL version 3 or later.*http://gnu.org/licenses/gpl.html&gt;|<a href="http://gnu.org/licenses/gpl.html">GNU GPL version 3 or later</a>|s;
+    $html =~ s|GNU GPL version 3 or later.*http://gnu.org/licenses/gpl.html&gt;|<a href="http://www.gnu.org/licenses/gpl.html">GNU GPL version 3 or later</a>|s;
     $html =~ s|<h2>.*?</h2>|<div class="outline-2">$&</div>|smg;
     $html =~ s|(<a href="#.*?">.*?</a><br>\n)+|<div id="table-of-contents"><h2>Table of Contents</h2><div id="text-table-of-contents"><ul>\n$&</ul></div></div>|sm;
     $html =~ s|(<a href="#.*?">.*?</a>)<br>|<li>$1</li>|g;