diff --git a/src/fullscreen.js b/src/fullscreen.js
index f868d7f2..e2920049 100644
--- a/src/fullscreen.js
+++ b/src/fullscreen.js
@@ -35,7 +35,8 @@
 /*
  * Implementation and research by John Dyer in:
  * http://johndyer.name/native-fullscreen-javascript-api-plus-jquery-plugin/
- * John Dyer has released this fullscreen code under the MIT license; see #81.
+ * John Dyer has released this fullscreen code under the MIT license; see
+ * <https://github.com/openseadragon/openseadragon/issues/81>.
  *
  * Copyright (C) 2011 John Dyer
  *
diff --git a/src/osmtilesource.js b/src/osmtilesource.js
index 24ccff5b..5036e7a9 100644
--- a/src/osmtilesource.js
+++ b/src/osmtilesource.js
@@ -36,7 +36,7 @@
  * Derived from the OSM tile source in Rainer Simon's seajax-utils project
  * <http://github.com/rsimon/seajax-utils>.  Rainer Simon has contributed
  * the included code to the OpenSeadragon project under the New BSD license;
- * see #58.
+ * see <https://github.com/openseadragon/openseadragon/issues/58>.
  */
 
 
diff --git a/src/tmstilesource.js b/src/tmstilesource.js
index c782f2e9..42bc7591 100644
--- a/src/tmstilesource.js
+++ b/src/tmstilesource.js
@@ -36,7 +36,7 @@
  * Derived from the TMS tile source in Rainer Simon's seajax-utils project
  * <http://github.com/rsimon/seajax-utils>.  Rainer Simon has contributed
  * the included code to the OpenSeadragon project under the New BSD license;
- * see #58.
+ * see <https://github.com/openseadragon/openseadragon/issues/58>.
  */