diff --git a/src/Ui/UiRequest.py b/src/Ui/UiRequest.py
index d7a89838..48c56c61 100644
--- a/src/Ui/UiRequest.py
+++ b/src/Ui/UiRequest.py
@@ -267,7 +267,7 @@ class UiRequest(object):
         if match:
             address = match.group("address")
             inner_path = match.group("inner_path").lstrip("/")
-            if "." in inner_path and not inner_path.endswith(".html"):
+            if "." in inner_path and not inner_path.endswith(".html") and not inner_path.endswith(".htm"):
                 return self.actionSiteMedia("/media" + path)  # Only serve html files with frame
             if self.isAjaxRequest():
                 return self.error403("Ajax request not allowed to load wrapper")  # No ajax allowed on wrapper