diff --git a/web.config b/web.config
index 72a041f63..85d2c1b1b 100644
--- a/web.config
+++ b/web.config
@@ -38,7 +38,7 @@
                     <action type="Redirect" url="error" redirectType="Permanent" />
                 </rule>
                 <rule name="system" stopProcessing="true">
-                    <match url="^system/(.*)$" ignoreCase="false" />
+                    <match url="^system/(.*)\.(txt|md|html|yaml|php|twig|sh|bat)$" ignoreCase="false" />
                     <action type="Redirect" url="error" redirectType="Permanent" />
                 </rule>
                 <rule name="vendor" stopProcessing="true">