diff --git a/src/app.config.json b/src/app.config.json
index 6af1d00f2..01436f1bf 100644
--- a/src/app.config.json
+++ b/src/app.config.json
@@ -18,7 +18,7 @@
         "supportedPageSizes": [25, 50, 100]
     },
     "files": {
-        "excluded": [".DS_Store", "desktop.ini", "thumbs.db", ".git"]
+        "excluded": [".DS_Store", "desktop.ini", "Thumbs.db", ".git"]
     },
     "adf-version-manager": {
         "allowComments": true,