diff --git a/Pipfile b/Pipfile
index 8d08e0bd..ad8b8fe0 100644
--- a/Pipfile
+++ b/Pipfile
@@ -10,6 +10,9 @@ requests = "*"
 isort = "*"
 databases = {extras = ["sqlite"],version = "*"}
 pytest-asyncio = "*"
+flake8-docstrings = "*"
+flake8-commas = "*"
+flake8-quotes = "*"
 
 [packages]
 fastapi = "*"
diff --git a/Pipfile.lock b/Pipfile.lock
index e925284a..16aaf184 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -1,7 +1,7 @@
 {
     "_meta": {
         "hash": {
-            "sha256": "3f2120d9354ee0e8e94a16b4dd1c948e2eb13d91fd71798c4005effc786b93f0"
+            "sha256": "f7c633af131b61f7664ea0e0bd6a0f68c21ba9bcde07d86d99e44a9a136fd0ae"
         },
         "pipfile-spec": 6,
         "requires": {
@@ -227,6 +227,29 @@
             "index": "pypi",
             "version": "==3.7.8"
         },
+        "flake8-commas": {
+            "hashes": [
+                "sha256:d3005899466f51380387df7151fb59afec666a0f4f4a2c6a8995b975de0f44b7",
+                "sha256:ee2141a3495ef9789a3894ed8802d03eff1eaaf98ce6d8653a7c573ef101935e"
+            ],
+            "index": "pypi",
+            "version": "==2.0.0"
+        },
+        "flake8-docstrings": {
+            "hashes": [
+                "sha256:3d5a31c7ec6b7367ea6506a87ec293b94a0a46c0bce2bb4975b7f1d09b6f3717",
+                "sha256:a256ba91bc52307bef1de59e2a009c3cf61c3d0952dbe035d6ff7208940c2edc"
+            ],
+            "index": "pypi",
+            "version": "==1.5.0"
+        },
+        "flake8-quotes": {
+            "hashes": [
+                "sha256:5dbaf668887873f28346fb87943d6da2e4b9f77ce9f2169cff21764a0a4934ed"
+            ],
+            "index": "pypi",
+            "version": "==2.1.0"
+        },
         "idna": {
             "hashes": [
                 "sha256:c357b3f628cf53ae2c4c05627ecc484553142ca23264e593d327bcde5e9c3407",
@@ -292,6 +315,13 @@
             ],
             "version": "==2.5.0"
         },
+        "pydocstyle": {
+            "hashes": [
+                "sha256:04c84e034ebb56eb6396c820442b8c4499ac5eb94a3bda88951ac3dc519b6058",
+                "sha256:66aff87ffe34b1e49bff2dd03a88ce6843be2f3346b0c9814410d34987fbab59"
+            ],
+            "version": "==4.0.1"
+        },
         "pyflakes": {
             "hashes": [
                 "sha256:17dbeb2e3f4d772725c777fabc446d5634d1038f234e77343108ce445ea69ce0",
@@ -337,6 +367,13 @@
             ],
             "version": "==1.12.0"
         },
+        "snowballstemmer": {
+            "hashes": [
+                "sha256:209f257d7533fdb3cb73bdbd24f436239ca3b2fa67d56f6ff88e86be08cc5ef0",
+                "sha256:df3bac3df4c2c01363f3dd2cfa78cce2840a79b9f1c2d2de9ce8d31683992f52"
+            ],
+            "version": "==2.0.0"
+        },
         "sqlalchemy": {
             "hashes": [
                 "sha256:272a835758908412e75e87f75dd0179a51422715c125ce42109632910526b1fd"
diff --git a/fastapi_users/authentication/jwt.py b/fastapi_users/authentication/jwt.py
index f7858de2..eb70be00 100644
--- a/fastapi_users/authentication/jwt.py
+++ b/fastapi_users/authentication/jwt.py
@@ -10,7 +10,7 @@ from starlette.responses import Response
 from fastapi_users.authentication import BaseAuthentication
 from fastapi_users.models import UserDB
 
-oauth2_scheme = OAuth2PasswordBearer(tokenUrl="/login")
+oauth2_scheme = OAuth2PasswordBearer(tokenUrl='/login')
 
 
 def generate_jwt(data: dict, lifetime_seconds: int, secret: str, algorithm: str) -> str:
diff --git a/setup.cfg b/setup.cfg
index 10d7ac2a..f652669a 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,6 +1,7 @@
 [flake8]
 exclude = docs
 max-line-length = 119
+docstring-convention = numpy
 
 [isort]
 atomic = true