diff --git a/OVA/sheet.json b/OVA/sheet.json
index 48273465f2..100ac0dcb1 100644
--- a/OVA/sheet.json
+++ b/OVA/sheet.json
@@ -3,6 +3,6 @@
    "css": "OVA.css",
    "authors": "Rich Finder",
    "roll20userid": "173448",
-   "preview": "OVA.PNG",
+   "preview": "OVA.png",
    "instructions": "# OVA Character Sheet\r\r\r## Dice Rolling\r\rEnter the number of dice to roll in the \"Number of Dice to roll\" field and press the roll button (the roll button is also a token action so is always available when the token is selected). The results will be put in a roll template for easy reading."
 }