diff --git a/src/Dokuwiki/Reader.php b/src/Dokuwiki/Reader.php
index dd9ef30..b56c730 100644
--- a/src/Dokuwiki/Reader.php
+++ b/src/Dokuwiki/Reader.php
@@ -34,7 +34,7 @@ class Reader
         '/\*\*/' => '',
         '/\'\'/' => '',
         '/\%\%/' => '',
-        '/\/\//' => '',
+        '/(?<!:)\/\//' => '',
 
         // Remove extra spaces
         '/(\s)\s+/' => '$1',