diff --git a/lib/linguist/languages.yml b/lib/linguist/languages.yml
index 34410128..8d56ae5a 100644
--- a/lib/linguist/languages.yml
+++ b/lib/linguist/languages.yml
@@ -2813,7 +2813,11 @@ XML:
   - .classpath
   - .project
   - build.xml.dist
+  - packages.config
   - phpunit.xml.dist
+  - Web.config
+  - Web.Debug.config
+  - Web.Release.config
 
 XProc:
   type: programming