diff --git a/py/load_firmware.py b/py/load_firmware.py
index 67a10456..f501f582 100755
--- a/py/load_firmware.py
+++ b/py/load_firmware.py
@@ -151,6 +151,16 @@
         'b7c2108d404de7b40c30d772cd668f361a8174369e5c33add1dfebd3e1bc222f296d1dda936ac6b4ff6e66d48e0d8df58bc99f5119079b5008a41e63203df6d2'
         'af85433087dbb3501aa7148bc9ee8209943070ab110d99512a843c2df753ffda45c4e0a40609d252d8cc53e56f866faf4895067d45f39ca4f91ab6559a1c02c7'
         )
+elif '6.0.4' in version:
+  sig = (
+        '00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000'
+        '00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000'
+        '00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000'
+        '94a319fa4e208a3703615ab1a1d5b91c0c60fa06ce11cf1f3b95715231ce05c266fb7b92ffda64e7781152048ba5f24350eb886d2bb2ad203aa268584e531a9b'
+        'a8f80f6d85a8d2f88d552a6543949f949eccd360449b0a81f8065c38a3aa163d67c6254078114f85d910062fc8e51c20e461a1c4219c6911dfb2d5242b39c739'
+        '30f12c64b516380ab1adaceb4f3f4008b003ce6c3d0f51cfe4509990b568c9c5252748099a95d0b2127ccb7b3c92c9b19fc32a26df100761fe0aacb52233afb7'
+        '34f59a71d7d46c22439700804cf02898f7e9c592f8c3c3c533da234e04201be2112dd33c0574eb1befeda3ea70d6a5c4690bcbc7ea02a38fd67427f8ceab1d4f'
+        )
 elif 'debug' in version:
     sig = (
         '00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000'