diff --git a/pactus/crypto/secp256k1/private_key.py b/pactus/crypto/secp256k1/private_key.py
index 6ba71ca..e95bec6 100644
--- a/pactus/crypto/secp256k1/private_key.py
+++ b/pactus/crypto/secp256k1/private_key.py
@@ -1,5 +1,8 @@
 from __future__ import annotations
 
+import hashlib
+from functools import partial
+
 import secp256k1
 
 from pactus.crypto.hrp import HRP
@@ -62,6 +65,7 @@ def public_key(self) -> PublicKey:
         return PublicKey(self.scalar.pubkey)
 
     def sign(self, msg: bytes) -> Signature:
-        sig = self.scalar.ecdsa_sign(msg)
+        digest = partial(hashlib.blake2b, digest_size=32)
+        sig = self.scalar.ecdsa_sign(msg, digest=digest)
         sig_compact = self.scalar.ecdsa_serialize_compact(sig)
         return Signature(sig_compact)
diff --git a/pactus/crypto/secp256k1/public_key.py b/pactus/crypto/secp256k1/public_key.py
index 12b5137..6970fed 100644
--- a/pactus/crypto/secp256k1/public_key.py
+++ b/pactus/crypto/secp256k1/public_key.py
@@ -1,6 +1,7 @@
 from __future__ import annotations
 
 import hashlib
+from functools import partial
 
 import secp256k1
 from ripemd.ripemd160 import ripemd160
@@ -58,9 +59,10 @@ def account_address(self) -> Address:
 
     def verify(self, msg: bytes, sig: Signature) -> bool:
         try:
+            digest = partial(hashlib.blake2b, digest_size=32)
             sig_compact = sig.raw_bytes()
             sig_deserialized = self.pub.ecdsa_deserialize_compact(sig_compact)
-            return self.pub.ecdsa_verify(msg, sig_deserialized)
+            return self.pub.ecdsa_verify(msg, sig_deserialized, digest=digest)
 
         # ruff: noqa: BLE001  #  unable to fix this issue
         except Exception:
diff --git a/tests/test_crypto_secp256k1.py b/tests/test_crypto_secp256k1.py
index 0a10b0c..9efc067 100644
--- a/tests/test_crypto_secp256k1.py
+++ b/tests/test_crypto_secp256k1.py
@@ -26,7 +26,7 @@ def test_encoding(self):
 
         msg = b"pactus"
         sig = Secp256k1Signature.from_string(
-            "16e6f8bcdb92964a35773aae200628a5b470b6488d42ceef6538da0b4ffd3b42098dd821eea96f66ba02c9c4473443ab51c411ab78adfbb90d53b07ca1d6862b"
+            "c86779676d217b04979434e5bd37eddd02b671e9a54b48d3a812c7862dcb539631bb5e8459fec007608f50ea5661e0a5215aac976705404cb4f36ee623e63199"
         )
 
         self.assertTrue(pub.verify(msg, sig))