diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 5ad72f2..9265289 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -9,10 +9,10 @@ jobs:
     steps:
       - uses: actions/checkout@v2
 
-      - name: Set up Python 3.7
+      - name: Set up Python 3.8
         uses: actions/setup-python@v2
         with:
-          python-version: 3.7
+          python-version: 3.8
 
       - name: Cache pip
         uses: actions/cache@v2
@@ -39,10 +39,10 @@ jobs:
     steps:
       - uses: actions/checkout@v2
 
-      - name: Set up Python 3.7
+      - name: Set up Python 3.8
         uses: actions/setup-python@v2
         with:
-          python-version: 3.7
+          python-version: 3.8
 
       - name: Cache pip
         uses: actions/cache@v2
diff --git a/README.md b/README.md
index 2119514..60f5d77 100644
--- a/README.md
+++ b/README.md
@@ -103,7 +103,7 @@ Embedding(8002, 768, padding_idx=1)
 
 - `tokenization_kobert.py`를 랩핑한 파이썬 라이브러리
 - KoBERT, DistilKoBERT를 Huggingface Transformers 라이브러리 형태로 제공
-- `v0.5.1`에서는 `transformers v3.0` 이상으로 기본 설치합니다. (`transformers v4.0` 까지는 이슈 없이 사용 가능)
+- `v0.5.1`이상부터는 `transformers v3.0` 이상으로 기본 설치합니다. (`transformers v4.0` 까지는 이슈 없이 사용 가능)
 
 ### Install Kobert-Transformers
 
diff --git a/kobert_transformers/load_model.py b/kobert_transformers/load_model.py
index 30d6d35..463d191 100644
--- a/kobert_transformers/load_model.py
+++ b/kobert_transformers/load_model.py
@@ -2,24 +2,24 @@
 
 
 def get_kobert_model():
-    """ Return BertModel for Kobert """
+    """Return BertModel for Kobert"""
     model = BertModel.from_pretrained("monologg/kobert")
     return model
 
 
 def get_kobert_lm():
-    """ Return BertForMaskedLM for Kobert """
+    """Return BertForMaskedLM for Kobert"""
     model = BertForMaskedLM.from_pretrained("monologg/kobert-lm")
     return model
 
 
 def get_distilkobert_model():
-    """ Return DistilBertModel for DistilKobert """
+    """Return DistilBertModel for DistilKobert"""
     model = DistilBertModel.from_pretrained("monologg/distilkobert")
     return model
 
 
 def get_distilkobert_lm():
-    """ Return DistilBertForMaskedLM for DistilKobert """
+    """Return DistilBertForMaskedLM for DistilKobert"""
     model = DistilBertForMaskedLM.from_pretrained("monologg/distilkobert")
     return model
diff --git a/kobert_transformers/tokenization_kobert.py b/kobert_transformers/tokenization_kobert.py
index 1efe2df..7442241 100644
--- a/kobert_transformers/tokenization_kobert.py
+++ b/kobert_transformers/tokenization_kobert.py
@@ -82,7 +82,6 @@ def __init__(
         mask_token="[MASK]",
         **kwargs,
     ):
-
         # Build vocab
         self.token2idx = dict()
         self.idx2token = []
@@ -178,7 +177,7 @@ def _tokenize(self, text):
         return new_pieces
 
     def _convert_token_to_id(self, token):
-        """ Converts a token (str/unicode) in an id using the vocab. """
+        """Converts a token (str/unicode) in an id using the vocab."""
         return self.token2idx.get(token, self.token2idx[self.unk_token])
 
     def _convert_id_to_token(self, index):
diff --git a/kobert_transformers/version.txt b/kobert_transformers/version.txt
index 5d4294b..09a3acf 100644
--- a/kobert_transformers/version.txt
+++ b/kobert_transformers/version.txt
@@ -1 +1 @@
-0.5.1
\ No newline at end of file
+0.6.0
\ No newline at end of file
diff --git a/requirements-dev.txt b/requirements-dev.txt
index 9f207f2..5f74681 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -1,7 +1,7 @@
 # for clean code :)
-isort==5.7.0
-black==20.8b1
-flake8==3.8.4
+isort==5.12.0 
+black==23.10.0 
+flake8==6.1.0
 
 # for safe code :)
-pytest==6.2.1
\ No newline at end of file
+pytest==7.4.2
\ No newline at end of file