diff --git a/README.md b/README.md
index 4157229..586ffce 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@
 [![PyPI pyversions](https://img.shields.io/pypi/pyversions/pycsvy.svg)](https://pypi.python.org/pypi/pycsvy/)
 [![PyPI license](https://img.shields.io/pypi/l/pycsvy.svg)](https://pypi.python.org/pypi/pycsvy/)
 [![codecov](https://codecov.io/gh/ImperialCollegeLondon/pycsvy/branch/develop/graph/badge.svg?token=N03KYNUD18)](https://codecov.io/gh/ImperialCollegeLondon/pycsvy)
-[![Codacy Badge](https://app.codacy.com/project/badge/Grade/8d1b791b315f4814a128d94483499561)](https://www.codacy.com/gh/ImperialCollegeLondon/pycsvy/dashboard?utm_source=github.com&utm_medium=referral&utm_content=ImperialCollegeLondon/pycsvy&utm_campaign=Badge_Grade)
+[![Codacy Badge](https://app.codacy.com/project/badge/Grade/8d1b791b315f4814a128d94483499561)](https://app.codacy.com/gh/ImperialCollegeLondon/pycsvy/dashboard?utm_source=github.com&utm_medium=referral&utm_content=ImperialCollegeLondon/pycsvy&utm_campaign=Badge_Grade)
 [![pre-commit.ci status](https://results.pre-commit.ci/badge/github/ImperialCollegeLondon/pycsvy/develop.svg)](https://results.pre-commit.ci/latest/github/ImperialCollegeLondon/pycsvy/develop)
 <!-- ALL-CONTRIBUTORS-BADGE:START - Do not remove or modify this section -->
 [![All Contributors](https://img.shields.io/badge/all_contributors-3-orange.svg?style=flat-square)](#contributors-)
@@ -26,7 +26,7 @@ dialect](https://specs.frictionlessdata.io/csv-dialect/) used and a [Table
 Schema](https://specs.frictionlessdata.io/table-schema/) specifying the contents of each
 column to aid the reading and interpretation of the data.
 
-## Instalation
+## Installation
 
 'pycsvy' is available in PyPI therefore its installation is as easy as:
 
diff --git a/csvy/writers.py b/csvy/writers.py
index 3bb2033..34f7130 100644
--- a/csvy/writers.py
+++ b/csvy/writers.py
@@ -234,7 +234,6 @@ def write_csv(
     Returns:
         True if the writer worked, False otherwise.
     """
-    import csv
 
     with open(filename, "a", newline="") as f:
         writer = csv.writer(f, **kwargs)
diff --git a/poetry.lock b/poetry.lock
index f84d65a..c3e4e2b 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1,4 +1,4 @@
-# This file is automatically @generated by Poetry and should not be changed by hand.
+# This file is automatically @generated by Poetry 1.4.2 and should not be changed by hand.
 
 [[package]]
 name = "attrs"
@@ -918,9 +918,9 @@ files = [
 
 [package.dependencies]
 numpy = [
+    {version = ">=1.20.3", markers = "python_version < \"3.10\""},
     {version = ">=1.21.0", markers = "python_version >= \"3.10\""},
     {version = ">=1.23.2", markers = "python_version >= \"3.11\""},
-    {version = ">=1.20.3", markers = "python_version < \"3.10\""},
 ]
 python-dateutil = ">=2.8.1"
 pytz = ">=2020.1"
@@ -1088,22 +1088,6 @@ pytest = ">=4.6"
 [package.extras]
 testing = ["fields", "hunter", "process-tests", "pytest-xdist", "six", "virtualenv"]
 
-[[package]]
-name = "pytest-flake8"
-version = "1.1.1"
-description = "pytest plugin to check FLAKE8 requirements"
-category = "dev"
-optional = false
-python-versions = "*"
-files = [
-    {file = "pytest-flake8-1.1.1.tar.gz", hash = "sha256:ba4f243de3cb4c2486ed9e70752c80dd4b636f7ccb27d4eba763c35ed0cd316e"},
-    {file = "pytest_flake8-1.1.1-py2.py3-none-any.whl", hash = "sha256:e0661a786f8cbf976c185f706fdaf5d6df0b1667c3bcff8e823ba263618627e7"},
-]
-
-[package.dependencies]
-flake8 = ">=4.0"
-pytest = ">=7.0"
-
 [[package]]
 name = "pytest-mock"
 version = "3.10.0"
@@ -1138,12 +1122,12 @@ files = [
 attrs = ">=19.0"
 filelock = ">=3.0"
 mypy = [
-    {version = ">=0.780", markers = "python_version >= \"3.9\""},
     {version = ">=0.700", markers = "python_version >= \"3.8\" and python_version < \"3.9\""},
+    {version = ">=0.780", markers = "python_version >= \"3.9\""},
 ]
 pytest = [
-    {version = ">=6.2", markers = "python_version >= \"3.10\""},
     {version = ">=4.6", markers = "python_version >= \"3.6\" and python_version < \"3.10\""},
+    {version = ">=6.2", markers = "python_version >= \"3.10\""},
 ]
 
 [[package]]
@@ -1423,4 +1407,4 @@ testing = ["flake8 (<5)", "func-timeout", "jaraco.functools", "jaraco.itertools"
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.8"
-content-hash = "459913b54660cd442123b8b434415ca2622045d6125136170579ba0779352af5"
+content-hash = "af576e4419638482506402599a635077cc829198fb7c83cbaeedf47d32ac76fd"
diff --git a/pyproject.toml b/pyproject.toml
index 97c495c..8256795 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -28,7 +28,6 @@ PyYAML = "^6.0"
 [tool.poetry.dev-dependencies]
 pytest = "^7.2"
 pytest-cov = "^3.0.0"
-pytest-flake8 = "^1.1.1"
 pytest-mypy = "^0.9.1"
 pytest-mock = "^3.7.0"
 isort = "^5.10.1"
diff --git a/setup.cfg b/setup.cfg
index 8c152f1..52c4052 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -8,7 +8,7 @@ test = pytest
 
 [tool:pytest]
 addopts = 
-	-v --flake8 --mypy -p no:warnings
+	-v --mypy -p no:warnings
 	--cov=csvy  --cov-report=html:reports/coverage/html
 	--cov-report=xml:reports/coverage/coverage.xml
 	--doctest-modules --ignore=docs/