diff --git a/README.md b/README.md
index 36ec3fa..913e654 100644
--- a/README.md
+++ b/README.md
@@ -6,8 +6,8 @@
 ![Python package](https://github.com/kinegratii/borax/workflows/Python%20package/badge.svg)
 ![Codecov](https://codecov.io/github/kinegratii/borax/coverage.svg)
 ![GitHub license](https://img.shields.io/github/license/kinegratii/borax)
-![Document](https://img.shields.io/badge/%E6%96%87%E6%A1%A3-docsify%20%7C%20%E8%AF%AD%E9%9B%80-brightgreen)
-
+![Document](https://img.shields.io/badge/%E6%96%87%E6%A1%A3-docsify-brightgreen)
+[![borax](https://snyk.io/advisor/python/borax/badge.svg)](https://snyk.io/advisor/python/borax)
 
 
 ## 概述 (Overview)
diff --git a/borax/__init__.py b/borax/__init__.py
index 5d1f521..8bc59e0 100644
--- a/borax/__init__.py
+++ b/borax/__init__.py
@@ -1,4 +1,4 @@
 # coding=utf8
 
-__version__ = '3.5.3'
+__version__ = '3.5.4'
 __author__ = 'kinegratii'
diff --git a/borax/datasets/fetch.py b/borax/datasets/fetch.py
index a7e9911..67f436e 100644
--- a/borax/datasets/fetch.py
+++ b/borax/datasets/fetch.py
@@ -5,7 +5,7 @@
 from functools import partial
 from itertools import tee
 
-__all__ = ['Empty', 'fetch', 'ifetch', 'fetch_single', 'ifetch_multiple', 'ifetch_single', 'fetch_as_dict']
+__all__ = ['Empty', 'bget', 'fetch', 'ifetch', 'fetch_single', 'ifetch_multiple', 'ifetch_single', 'fetch_as_dict']
 
 
 class Empty:
@@ -18,7 +18,7 @@ class Empty:
 def bget(obj, key, default=Empty):
     try:
         return obj[key]
-    except KeyError:
+    except (TypeError, KeyError):
         pass
     try:
         return getattr(obj, key)
diff --git a/borax/htmls.py b/borax/htmls.py
index 502f6f8..cb4b870 100644
--- a/borax/htmls.py
+++ b/borax/htmls.py
@@ -1,7 +1,7 @@
 # coding=utf8
 
 import html
-from typing import Dict, List, Optional
+from typing import Dict, List, Optional, Union
 
 
 def _escape(s):
@@ -58,7 +58,7 @@ def html_params(**kwargs) -> str:
 
 
 def html_tag(tag_name: str, content: str = None,
-             *, id_: str = None, style: Dict = None, class_: Optional[List] = None, **kwargs) -> HTMLString:
+             *, id_: str = None, style: Dict = None, class_: Union[List, str, None] = None, **kwargs) -> HTMLString:
     """生成元素的html字符串"""
     kw = {}
     if id_:
diff --git a/docs/README.md b/docs/README.md
index 1c9dbb5..e273d10 100644
--- a/docs/README.md
+++ b/docs/README.md
@@ -6,8 +6,8 @@
 ![Python package](https://github.com/kinegratii/borax/workflows/Python%20package/badge.svg)
 ![Codecov](https://codecov.io/github/kinegratii/borax/coverage.svg)
 ![GitHub license](https://img.shields.io/github/license/kinegratii/borax)
-![Document](https://img.shields.io/badge/%E6%96%87%E6%A1%A3-docsify%20%7C%20%E8%AF%AD%E9%9B%80-brightgreen)
-
+![Document](https://img.shields.io/badge/%E6%96%87%E6%A1%A3-docsify-brightgreen)
+[![borax](https://snyk.io/advisor/python/borax/badge.svg)](https://snyk.io/advisor/python/borax)
 
 
 
@@ -38,4 +38,4 @@ Borax 是一个Python3工具集合库。
 ## 开发(Development)
 
 - **代码仓库**：[Github](https://github.com/kinegratii/borax/) | [Gitee (镜像)](https://gitee.com/kinegratii/borax)
-- **项目开发**:  [版本日志](changelog) | [技术文档](develope/develope)
\ No newline at end of file
+- **项目开发**:  [版本日志](changelog) | [技术文档(外链)](http://fd8cc08f.wiz06.com/wapp/pages/view/share/s/3Zzc2f0LJQ3w2TWIQb0ZMSna1zg4gs1vPQmb2vlh9M2zhqK8)
\ No newline at end of file
diff --git a/docs/_sidebar.md b/docs/_sidebar.md
index 64371b0..97328fe 100644
--- a/docs/_sidebar.md
+++ b/docs/_sidebar.md
@@ -28,5 +28,4 @@
 - **● 发布日志**
   - [v3.5](release-note/v350)
 - **● 项目开发**
-  - [版本日志](changelog)
-  - [技术文档](develope/develope)
\ No newline at end of file
+  - [版本日志](changelog)
\ No newline at end of file
diff --git a/docs/changelog.md b/docs/changelog.md
index d3f7602..b4d9435 100644
--- a/docs/changelog.md
+++ b/docs/changelog.md
@@ -1,5 +1,12 @@
 # 更新日志
 
+## v3.5.4 (20220314)
+
+- `borax.htmls`
+  - `html_tag` 函数css参数支持str类型（函数逻辑已支持，本次仅添加typing hints）
+- `borax.datasets.fetch` 模块
+  - 修正 `fetch` 解析错误的bug （[#39](https://github.com/kinegratii/borax/issues/39)）
+
 ## v3.5.3 (20220303)
 
 - `borax.serialize.cjson`
diff --git a/docs/develope/develope.md b/docs/develope/develope.md
deleted file mode 100644
index a4066e5..0000000
--- a/docs/develope/develope.md
+++ /dev/null
@@ -1,3 +0,0 @@
-# 技术文档
-
-参见 [Borax项目开发技术文档](http://fd8cc08f.wiz06.com/wapp/pages/view/share/s/3Zzc2f0LJQ3w2TWIQb0ZMSna1zg4gs1vPQmb2vlh9M2zhqK8) ，该文档不定时更新。
\ No newline at end of file
diff --git a/pyproject.toml b/pyproject.toml
deleted file mode 100644
index 2569864..0000000
--- a/pyproject.toml
+++ /dev/null
@@ -1,32 +0,0 @@
-[tool.poetry]
-name = "borax"
-version = "3.5.1"
-description = "A util collections for Python3."
-readme = "README.md"
-authors = ["kinegratii <kinegratii@gmail.com>"]
-homepage = "https://github.com/kinegratii/borax"
-documentation = "https://kinegratii.github.io/borax"
-license = "MIT"
-keywords = ["python3", "utils", "lunar-calendar"]
-classifiers=[
-    "Development Status :: 5 - Production/Stable",
-    "Programming Language :: Python :: 3",
-    "Programming Language :: Python :: 3.6",
-    "Programming Language :: Python :: 3.7",
-    "Programming Language :: Python :: 3.8",
-    "Programming Language :: Python :: 3.9",
-    "Programming Language :: Python :: 3.10",
-    "Programming Language :: Python :: 3 :: Only",
-    "Intended Audience :: Developers",
-    "License :: OSI Approved :: MIT License",
-    "Topic :: Software Development :: Libraries",
-    "Topic :: Utilities",
-    'Operating System :: OS Independent'
-]
-
-[tool.poetry.dev-dependencies]
-nose = "^0.10"
-coverage = "^5.5"
-flake8 = "^3.9"
-mccabe = "^0.6"
-wheel = "^0.36"
\ No newline at end of file
diff --git a/setup.py b/setup.py
index 7d73a5a..7816c0e 100644
--- a/setup.py
+++ b/setup.py
@@ -39,7 +39,7 @@
     author='kinegratii',
     author_email='zhenwei.yan@hotmail.com',
     classifiers=lib_classifiers,
-    description='A tool collections for Python3.',
+    description='A tool collections.(Chinese-Lunar-Calendars/Python-Patterns)',
     long_description=long_description,
     long_description_content_type='text/markdown'
 )
diff --git a/tests/test_fetch.py b/tests/test_fetch.py
index 579848b..60896d1 100644
--- a/tests/test_fetch.py
+++ b/tests/test_fetch.py
@@ -3,7 +3,7 @@
 
 import unittest
 
-from borax.datasets.fetch import fetch, fetch_single, ifetch_multiple, fetch_as_dict
+from borax.datasets.fetch import fetch, fetch_single, ifetch_multiple, fetch_as_dict, bget
 
 DICT_LIST_DATA = [
     {'id': 282, 'name': 'Alice', 'age': 30, 'sex': 'female'},
@@ -12,6 +12,22 @@
 ]
 
 
+class Point:
+    def __init__(self, x, y):
+        self.x = x
+        self.y = y
+
+
+class GetterTestCase(unittest.TestCase):
+    def test_default_getter(self):
+        p = Point(1, 2)
+        self.assertEqual(1, bget(p, 'x'))
+        p2 = [2, 4]
+        self.assertEqual(4, bget(p2, 1))
+        p3 = {'x': 5, 'y': 10}
+        self.assertEqual(5, bget(p3, 'x'))
+
+
 class FetchTestCase(unittest.TestCase):
     def test_fetch_single(self):
         names = fetch_single(DICT_LIST_DATA, 'name')
diff --git a/tests/test_htmls.py b/tests/test_htmls.py
index ea6a1b0..5814d82 100644
--- a/tests/test_htmls.py
+++ b/tests/test_htmls.py
@@ -5,6 +5,13 @@
 from borax.htmls import HTMLString, html_tag
 
 
+class HtmlStringTestCase(unittest.TestCase):
+    def test_html_string(self):
+        s = HTMLString('<div>Hello</div>')
+        s2 = HTMLString(s)
+        self.assertEqual(s.__html__(), s2.__html__())
+
+
 class HtmlTagTest(unittest.TestCase):
     def test_html_tags(self):
         html = html_tag('img', id_='idDemoImg', src='/demo.png')
@@ -20,3 +27,11 @@ def test_fixed_html(self):
         self.assertEqual('<div id="demo" style="width:2px;"></div>',
                          html_tag('div', id_='demo', style={'width': '2px'}))
         self.assertEqual('<div id="demo" class="a1 a2"></div>', html_tag('div', id_='demo', class_=['a1', 'a2']))
+
+    def test_css_attr(self):
+        self.assertEqual('<div class="one two"></div>', html_tag('div', class_=['one', 'two']))
+        self.assertEqual('<div class="one two"></div>', html_tag('div', class_='one two'))
+
+    def test_bool_attr(self):
+        self.assertEqual('<div id="sk" checked>Demo</div>', html_tag('div', id_='sk', content='Demo', checked=True))
+        self.assertEqual('<div id="sk">Demo</div>', html_tag('div', id_='sk', content='Demo', checked=False))