diff --git a/previewer_code/indico_previewer_code/plugin.py b/previewer_code/indico_previewer_code/plugin.py
index 7f3c0e8..858985e 100644
--- a/previewer_code/indico_previewer_code/plugin.py
+++ b/previewer_code/indico_previewer_code/plugin.py
@@ -27,7 +27,8 @@ register_custom_mimetypes()
 class PygmentsPreviewer(Previewer):
     # All supported MIME types
     MIMETYPES = ('text/css', 'text/x-python', 'text/x-ruby-script', 'text/x-java-source', 'text/x-c',
-                 'application/javascript', 'text/x-fortran', 'text/x-csharp', 'text/php', 'text/x-php')
+                 'application/javascript', 'application/x-javascript', 'text/x-fortran', 'text/x-csharp', 'text/php',
+                 'text/x-php')
 
     # Python's mimetypes lib and Pygments do not quite agree on some MIME types
     CUSTOM_LEXERS = {