diff --git a/README.md b/README.md
index d32caeb..89e3647 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,5 @@
 # Spoffy
 
-[![CircleCI](https://circleci.com/gh/steinitzu/spoffy/tree/master.svg?style=svg)](https://circleci.com/gh/steinitzu/spoffy/tree/master)
 [![Documentation Status](https://readthedocs.org/projects/spoffy/badge/?version=latest&style=flat-square)](https://spoffy.readthedocs.io/en/latest/?badge=latest)
 
 
@@ -14,7 +13,7 @@ Read the docs: https://spoffy.readthedocs.io
 ```
 pip install spoffy
 ```
-Python3.6 and newer are supported
+Python3.9 and newer are supported
 
 
 
diff --git a/codegen.py b/codegen.py
index d313966..7c933f7 100644
--- a/codegen.py
+++ b/codegen.py
@@ -82,7 +82,7 @@ def signature_to_keywords(method):
 
 
 def build_method_def(
-    method: ast.FunctionDef
+    method: ast.FunctionDef,
 ) -> Tuple[ast.FunctionDef, ast.AsyncFunctionDef]:
     orig = method
     method = deepcopy(method)
@@ -241,6 +241,6 @@ def build_classes():
         out_body += classes
         out_tree = ast.Module(out_body)
         source = to_source(out_tree)
-        source = black.format_str(source, line_length=79)
+        source = black.format_str(source, mode=black.Mode(line_length=79))
         output_file.write(source)
         print(source)
diff --git a/poetry.lock b/poetry.lock
index 25c7ef9..5c42849 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -123,13 +123,13 @@ files = [
 
 [[package]]
 name = "astor"
-version = "0.7.1"
+version = "0.8.1"
 description = "Read/rewrite/write Python ASTs"
 optional = false
-python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,>=2.7"
 files = [
-    {file = "astor-0.7.1-py2.py3-none-any.whl", hash = "sha256:fb503b9e2fdd05609fbf557b916b4a7824171203701660f0c55bbf5a7a68713e"},
-    {file = "astor-0.7.1.tar.gz", hash = "sha256:95c30d87a6c2cf89aa628b87398466840f0ad8652f88eb173125a6df8533fb8d"},
+    {file = "astor-0.8.1-py2.py3-none-any.whl", hash = "sha256:070a54e890cefb5b3739d19f30f5a5ec840ffc9c50ffa7d23cc9fc1a38ebbfc5"},
+    {file = "astor-0.8.1.tar.gz", hash = "sha256:6a6effda93f4e1ce9f618779b2dd1d9d84f1e32812c23a29b3fff6fd7f63fa5e"},
 ]
 
 [[package]]
@@ -1268,5 +1268,5 @@ multidict = ">=4.0"
 
 [metadata]
 lock-version = "2.0"
-python-versions = "^3.8"
-content-hash = "161b2510a72cc66d2e3a2eb3b59c9230df2635978dc8edbb851fcc0c17bfa78a"
+python-versions = "^3.9"
+content-hash = "10383e51a8a7cb07187a533ceacd5cacf82e0b84d31fd89aadcc6a23b372ba2c"
diff --git a/pyproject.toml b/pyproject.toml
index c1ef02f..2b02c85 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -44,7 +44,7 @@ sphinx-autodoc-typehints = "^1.6"
 sphinx_rtd_theme = "^0.4.3"
 aiohttp = "^3.9"
 requests = "^2.21"
-astor = "^0.7.1"
+astor = "^0.8"
 pytest-asyncio = "^0.23.4"
 sphinxcontrib-asyncio = "^0.2.0"
 
diff --git a/spoffy/client/common.py b/spoffy/client/common.py
index e06f02b..0dec737 100644
--- a/spoffy/client/common.py
+++ b/spoffy/client/common.py
@@ -124,4 +124,4 @@ def load(self, response: Response, target):
         data = response.json
         if data is None:
             return None
-        return target(**data)
+        return data