diff --git a/config/retrodeck/reference_lists/bios.json b/config/retrodeck/reference_lists/bios.json
index 1a94b72e..04cddd17 100644
--- a/config/retrodeck/reference_lists/bios.json
+++ b/config/retrodeck/reference_lists/bios.json
@@ -214,7 +214,7 @@
       "required": "required"
     },
     "ATARIOSB.ROM": {
-      "md5": "a3e8d617c95d08031fe1b20d541434b2",
+      "md5": "4177f386a3bac989a981d3fe3388cb6c",
       "system": "atari5200",
       "description": "BIOS for Atari 400/800 NTSC ",
       "required": "required"