diff --git a/.changeset/social-seas-join.md b/.changeset/social-seas-join.md
new file mode 100644
index 000000000..8ac1ef580
--- /dev/null
+++ b/.changeset/social-seas-join.md
@@ -0,0 +1,5 @@
+---
+'@relayprotocol/relay-bitcoin-wallet-adapter': patch
+---
+
+Allow default sighash when sending tx
diff --git a/packages/relay-bitcoin-wallet-adapter/src/adapter.ts b/packages/relay-bitcoin-wallet-adapter/src/adapter.ts
index d1ff65ca3..cf5688db8 100644
--- a/packages/relay-bitcoin-wallet-adapter/src/adapter.ts
+++ b/packages/relay-bitcoin-wallet-adapter/src/adapter.ts
@@ -51,7 +51,7 @@ export const adaptBitcoinWallet = (
       })
 
       const dynamicParams: DynamicSignPsbtParams = {
-        allowedSighash: [1], // Only allow SIGHASH_ALL
+        allowedSighash: [0, 1],
         unsignedPsbtBase64: psbt.toBase64(), // The unsigned PSBT in Base64 format
         signature
       }