diff --git a/Cargo.lock b/Cargo.lock
index 4b15e5a1..08a8f7a2 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2929,7 +2929,7 @@ checksum = "28d3b2b1366ec20994f1fd18c3c594f05c5dd4bc44d8bb0c1c632c8d6829481f"
 
 [[package]]
 name = "satoshi-bridge"
-version = "0.5.0"
+version = "0.5.1"
 dependencies = [
  "bitcoin",
  "crypto-shared",
diff --git a/contracts/satoshi-bridge/Cargo.toml b/contracts/satoshi-bridge/Cargo.toml
index 97f38c85..128301f2 100644
--- a/contracts/satoshi-bridge/Cargo.toml
+++ b/contracts/satoshi-bridge/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "satoshi-bridge"
-version = "0.5.0"
+version = "0.5.1"
 edition.workspace = true
 publish.workspace = true
 repository.workspace = true
diff --git a/contracts/satoshi-bridge/release_notes.md b/contracts/satoshi-bridge/release_notes.md
index d5687146..10ed83a8 100644
--- a/contracts/satoshi-bridge/release_notes.md
+++ b/contracts/satoshi-bridge/release_notes.md
@@ -1,5 +1,8 @@
 # Release Notes
 
+### Version 0.5.1
+1. remove lock_time validation for BTC transactions
+
 ### Version 0.5.0
 1. fix audit recommendation.
 
diff --git a/contracts/satoshi-bridge/src/api/bridge.rs b/contracts/satoshi-bridge/src/api/bridge.rs
index 683807a3..ea9e2e9a 100644
--- a/contracts/satoshi-bridge/src/api/bridge.rs
+++ b/contracts/satoshi-bridge/src/api/bridge.rs
@@ -31,10 +31,6 @@ impl Contract {
         let transaction = bytes_to_btc_transaction(&tx_bytes);
         let deposit_amount = transaction.output[vout].value.to_sat() as u128;
         require!(deposit_amount > 0, "Invalid deposit_amount");
-        require!(
-            transaction.lock_time == LockTime::ZERO,
-            "Tx with a non-zero lock_time are not supported."
-        );
         let deposit_address = self.generate_btc_p2wpkh_address(&path);
         let deposit_address_script_pubkey = deposit_address.script_pubkey();
         require!(