diff --git a/src/xhshow/generators/fingerprint.py b/src/xhshow/generators/fingerprint.py
index db2b967..38957e7 100644
--- a/src/xhshow/generators/fingerprint.py
+++ b/src/xhshow/generators/fingerprint.py
@@ -65,7 +65,7 @@ def generate_b1(self, fp: dict) -> str:
             b.append(int("".join(chars[:2]), 16))
             [b.append(ord(j)) for j in chars[2:]]
 
-        b1 = self._encoder.encode(json.dumps(b, separators=(",", ":")))
+        b1 = self._encoder.encode(bytearray(b))
 
         return b1
 
diff --git a/src/xhshow/utils/encoder.py b/src/xhshow/utils/encoder.py
index 0d105c9..a3faf96 100644
--- a/src/xhshow/utils/encoder.py
+++ b/src/xhshow/utils/encoder.py
@@ -2,6 +2,7 @@
 
 import base64
 import binascii
+from collections.abc import Iterable
 
 from ..config import CryptoConfig
 
@@ -29,7 +30,7 @@ def __init__(self, config: CryptoConfig):
             config.STANDARD_BASE64_ALPHABET,
         )
 
-    def encode(self, data_to_encode: str) -> str:
+    def encode(self, data_to_encode: bytes | str | Iterable[int]) -> str:
         """
         Encode a string using custom Base64 alphabet
 
@@ -39,7 +40,13 @@ def encode(self, data_to_encode: str) -> str:
         Returns:
             Base64 string encoded using custom alphabet
         """
-        data_bytes = data_to_encode.encode("utf-8")
+        if isinstance(data_to_encode, bytes | bytearray):
+            data_bytes = data_to_encode
+        elif isinstance(data_to_encode, str):
+            data_bytes = data_to_encode.encode("utf-8")
+        else:
+            # Iterable[int] case
+            data_bytes = bytearray(data_to_encode)
         standard_encoded_bytes = base64.b64encode(data_bytes)
         standard_encoded_string = standard_encoded_bytes.decode("utf-8")
 
diff --git a/tests/test_crypto.py b/tests/test_crypto.py
index 5bad44c..ce304e8 100644
--- a/tests/test_crypto.py
+++ b/tests/test_crypto.py
@@ -647,7 +647,7 @@ def test_sign_headers_parameter_validation(self):
         # Test unsupported method should raise error
         with pytest.raises(ValueError, match="Unsupported method"):
             client.sign_headers(
-                method="PUT",
+                method="PUT",  # type: ignore[arg-type]
                 uri="/api/test",
                 cookies=cookies,
                 params={"key": "value"},