diff --git a/electrum/lightning.json b/electrum/lightning.json
index cfafedc00..d6794e67c 100644
--- a/electrum/lightning.json
+++ b/electrum/lightning.json
@@ -630,7 +630,7 @@
   "payload": {
    "incoming_htlc_amt": {
     "position": "0",
-    "length": "4"
+    "length": "8"
    }
   }
  },