diff --git a/codebert.py b/codebert.py
index a80ce6c..187395a 100644
--- a/codebert.py
+++ b/codebert.py
@@ -16,7 +16,7 @@ import numpy
 import os
 import torch
 from pathlib import Path
-from transformers import AutoTokenizer, AutoModel
+from transformers import AutoConfig, AutoTokenizer, AutoModel
 
 from towhee.operator import NNOperator
 from towhee import register
@@ -65,10 +65,18 @@ class CodeBert(NNOperator):
         except Exception as e:
             log.error(f'Fail to load tokenizer by name: {self.model_name}')
             raise e
+        try:
+            self.configs = AutoConfig.from_pretrained(model_name)
+        except Exception as e:
+            log.error(f'Fail to load configs by name: {self.model_name}')
+            raise e
 
     def __call__(self, txt: str) -> numpy.ndarray:
         try:
-            inputs = self.tokenizer.encode(txt, return_tensors='pt').to(self.device)
+            tokens = self.tokenizer.tokenize(txt)
+            tokens = [tokenizer.cls_token, '<encoder-only>', tokenizer.sep_token] + tokens + [tokenizer.sep_token]
+            tokens_ids = tokenizer.convert_tokens_to_ids(tokens, return_tensors='pt')
+            inputs = torch.tensor(tokens_ids).to(self.device)
         except Exception as e:
             log.error(f'Invalid input for the tokenizer: {self.model_name}')
             raise e