diff --git a/The Worst Days/sheet.json b/The Worst Days/sheet.json
index c6ea8f405f97..ca53757c0c32 100644
--- a/The Worst Days/sheet.json	
+++ b/The Worst Days/sheet.json	
@@ -3,7 +3,7 @@
   "css": "WorstDays_CSS.css",
   "authors": "J.W.G. Wise",
   "roll20userid": "13087824",
-  "preview": "WorstDays.JPG",
+  "preview": "WorstDays.jpg",
   "instructions": "Pleae let us know if you have any suggestions!",
   "legacy": false
 }
\ No newline at end of file