diff --git a/src/doc/sections/0050_basics.inc b/src/doc/sections/0050_basics.inc
index aeb0cf0..4aa17c0 100644
--- a/src/doc/sections/0050_basics.inc
+++ b/src/doc/sections/0050_basics.inc
@@ -8,4 +8,4 @@ index.php?persons=2&objects=4+or+5&lengths=3+or+4&max=3&passesmin=1&passesmax=3
 	<li><strong>Max height:</strong><br>maximum height of throws is 3</li>
 	<li><strong>Passes:</strong><br>at least 1 and at most 3 passes</li>
 </ul>
-<p>If you need more information on symmetric passing patterns in genreal, have a look <a href="http://en.wikibooks.org/wiki/Symmetric_Passing_Patterns" target="_blank">here</a>.</p>
\ No newline at end of file
+<p>If you need more information on symmetric passing patterns in genreal, have a look <a href="https://en.wikibooks.org/wiki/Juggling/Symmetric_Passing_Patterns" target="_blank">here</a>.</p>
diff --git a/src/index.php b/src/index.php
index bc391ef..ed7ad1d 100644
--- a/src/index.php
+++ b/src/index.php
@@ -251,7 +251,7 @@
   </tr>
   <tr>
    <td class='lable'>&nbsp;</td>
-   <td class='input'><a href='http://en.wikibooks.org/wiki/Symmetric_Passing_Patterns'>learn about symmetric passing</a></td>
+   <td class='input'><a href='https://en.wikibooks.org/wiki/Juggling/Symmetric_Passing_Patterns'>learn about symmetric passing</a></td>
   </tr>
  </table>
  $hidden_debug
diff --git a/www/sourceforge/htdocs/index.html b/www/sourceforge/htdocs/index.html
index 4e38f9c..17f080a 100644
--- a/www/sourceforge/htdocs/index.html
+++ b/www/sourceforge/htdocs/index.html
@@ -32,7 +32,7 @@ <h1>
       To learn more about symmetric passing patterns, check out the wikibook:
      </p>
      <p class="location">
-      <a href="http://en.wikibooks.org/wiki/Symmetric_Passing_Patterns">http://en.wikibooks.org/wiki/Symmetric_Passing_Patterns</a>
+      <a href="https://en.wikibooks.org/wiki/Juggling/Symmetric_Passing_Patterns">https://en.wikibooks.org/wiki/Juggling/Symmetric_Passing_Patterns</a>
      </p>
      <p>
       Post <span class='emph'>questions, suggestions</span> and <span class='emph'>bugs</span> at the sourceforge.net project site: