diff --git a/dist/showdown.js b/dist/showdown.js
index 8a8f71b..9e12614 100644
Binary files a/dist/showdown.js and b/dist/showdown.js differ
diff --git a/dist/showdown.js.map b/dist/showdown.js.map
index a7d55e4..9dc87dd 100644
Binary files a/dist/showdown.js.map and b/dist/showdown.js.map differ
diff --git a/dist/showdown.min.js b/dist/showdown.min.js
index 41a081a..93d433f 100644
Binary files a/dist/showdown.min.js and b/dist/showdown.min.js differ
diff --git a/dist/showdown.min.js.map b/dist/showdown.min.js.map
index 8d1e0dc..ac3e289 100644
Binary files a/dist/showdown.min.js.map and b/dist/showdown.min.js.map differ
diff --git a/src/helpers.js b/src/helpers.js
index c72be00..dbe5465 100644
--- a/src/helpers.js
+++ b/src/helpers.js
@@ -376,5 +376,5 @@ if (typeof(console) === 'undefined') {
  * We declare some common regexes to improve performance
  */
 showdown.helper.regexes = {
-  asteriskAndDash: /([*_])/g
+  asteriskDashAndColon: /([*_:])/g
 };
diff --git a/src/subParsers/anchors.js b/src/subParsers/anchors.js
index 49676ea..525c6f9 100644
--- a/src/subParsers/anchors.js
+++ b/src/subParsers/anchors.js
@@ -33,14 +33,14 @@ showdown.subParser('anchors', function (text, options, globals) {
     }
 
     //url = showdown.helper.escapeCharacters(url, '*_', false); // replaced line to improve performance
-    url = url.replace(showdown.helper.regexes.asteriskAndDash, showdown.helper.escapeCharactersCallback);
+    url = url.replace(showdown.helper.regexes.asteriskDashAndColon, showdown.helper.escapeCharactersCallback);
 
     var result = '<a href="' + url + '"';
 
     if (title !== '' && title !== null) {
       title = title.replace(/"/g, '&quot;');
       //title = showdown.helper.escapeCharacters(title, '*_', false); // replaced line to improve performance
-      title = title.replace(showdown.helper.regexes.asteriskAndDash, showdown.helper.escapeCharactersCallback);
+      title = title.replace(showdown.helper.regexes.asteriskDashAndColon, showdown.helper.escapeCharactersCallback);
       result += ' title="' + title + '"';
     }
 
diff --git a/src/subParsers/images.js b/src/subParsers/images.js
index 62149ce..06dc5ae 100644
--- a/src/subParsers/images.js
+++ b/src/subParsers/images.js
@@ -56,16 +56,16 @@ showdown.subParser('images', function (text, options, globals) {
     altText = altText
       .replace(/"/g, '&quot;')
     //altText = showdown.helper.escapeCharacters(altText, '*_', false);
-      .replace(showdown.helper.regexes.asteriskAndDash, showdown.helper.escapeCharactersCallback);
+      .replace(showdown.helper.regexes.asteriskDashAndColon, showdown.helper.escapeCharactersCallback);
     //url = showdown.helper.escapeCharacters(url, '*_', false);
-    url = url.replace(showdown.helper.regexes.asteriskAndDash, showdown.helper.escapeCharactersCallback);
+    url = url.replace(showdown.helper.regexes.asteriskDashAndColon, showdown.helper.escapeCharactersCallback);
     var result = '<img src="' + url + '" alt="' + altText + '"';
 
     if (title) {
       title = title
         .replace(/"/g, '&quot;')
       //title = showdown.helper.escapeCharacters(title, '*_', false);
-        .replace(showdown.helper.regexes.asteriskAndDash, showdown.helper.escapeCharactersCallback);
+        .replace(showdown.helper.regexes.asteriskDashAndColon, showdown.helper.escapeCharactersCallback);
       result += ' title="' + title + '"';
     }