diff --git a/.github/workflows/linters.yaml b/.github/workflows/linters.yaml
new file mode 100644
index 0000000..3b3fb20
--- /dev/null
+++ b/.github/workflows/linters.yaml
@@ -0,0 +1,35 @@
+name: Linters
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    types: [opened, synchronize, reopened]
+
+jobs:
+  Run-Pre-Commit:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          fetch-depth: 32
+
+      - uses: actions/setup-python@v2
+        with:
+          python-version: 3.9
+
+      - name: Install pre-commit
+        run: pip3 install pre-commit
+
+      - name: Pre-commit (Push)
+        env:
+          SETUPTOOLS_USE_DISTUTILS: stdlib
+        if: ${{ github.event_name == 'push' }}
+        run: pre-commit run --source ${{ github.event.before }} --origin ${{ github.event.after }} --show-diff-on-failure
+
+      - name: Pre-commit (Pull-Request)
+        env:
+          SETUPTOOLS_USE_DISTUTILS: stdlib
+        if: ${{ github.event_name == 'pull_request' }}
+        run: pre-commit run --source ${{ github.event.pull_request.base.sha }} --origin ${{ github.event.pull_request.head.sha }} --show-diff-on-failure
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
new file mode 100644
index 0000000..5cf5615
--- /dev/null
+++ b/.pre-commit-config.yaml
@@ -0,0 +1,20 @@
+exclude: 'docs|node_modules|migrations|.git|.tox'
+
+repos:
+- repo: https://github.com/ambv/black
+  rev: 21.12b0
+  hooks:
+    - id: black
+      language_version: python3.9
+- repo: https://github.com/pycqa/isort
+  rev: 5.10.1
+  hooks:
+    - id: isort
+- repo: https://github.com/csachs/pyproject-flake8
+  rev: v0.0.1a2.post1
+  hooks:
+    - id: pyproject-flake8
+      additional_dependencies: [
+        '-e', 'git+https://github.com/pycqa/pyflakes@1911c20#egg=pyflakes',
+        '-e', 'git+https://github.com/pycqa/pycodestyle@d219c68#egg=pycodestyle',
+      ]
diff --git a/app/main.py b/app/main.py
index c586982..4041b54 100644
--- a/app/main.py
+++ b/app/main.py
@@ -1,27 +1,40 @@
-import uuid
 import asyncio
 import os
+import uuid
 
-from fastapi import FastAPI, APIRouter, File, UploadFile, Form, HTTPException, BackgroundTasks, status
+from fastapi import (
+    FastAPI,
+    APIRouter,
+    File,
+    UploadFile,
+    Form,
+    HTTPException,
+    BackgroundTasks,
+    status,
+)
 from fastapi.responses import FileResponse
+
 from starlette.background import BackgroundTask
 
 import aiofiles
+import aiofiles.ospath
 
 
-router = APIRouter(
-    tags=["converter"]
-)
+router = APIRouter(tags=["converter"])
 
 
 @router.post("/")
-async def convert(background_tasks: BackgroundTasks, file: UploadFile = File({}), format: str = Form({})):
+async def convert(
+    background_tasks: BackgroundTasks,
+    file: UploadFile = File({}),
+    format: str = Form({}),
+):
     temp_uuid = uuid.uuid1()
 
-    temp_filename = str(temp_uuid) + '.fb2'
-    converted_temp_filename = str(temp_uuid) + '.' + format
+    temp_filename = str(temp_uuid) + ".fb2"
+    converted_temp_filename = str(temp_uuid) + "." + format
 
-    async with aiofiles.open(temp_filename, 'wb') as f:
+    async with aiofiles.open(temp_filename, "wb") as f:
         content = await file.read()
 
         if isinstance(content, str):
@@ -30,21 +43,27 @@ async def convert(background_tasks: BackgroundTasks, file: UploadFile = File({})
         await f.write(content)
 
     proc = await asyncio.create_subprocess_exec(
-        './bin/fb2c', 'convert', '--to', format, temp_filename,
+        "./bin/fb2c",
+        "convert",
+        "--to",
+        format,
+        temp_filename,
         stdout=asyncio.subprocess.PIPE,
-        stderr=asyncio.subprocess.PIPE
+        stderr=asyncio.subprocess.PIPE,
     )
 
-    await proc.communicate()
+    _, stderr = await proc.communicate()
 
     background_tasks.add_task(os.remove, temp_filename)
 
-    if proc.returncode != 0:
-        return HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail="Can't convert!")
+    if proc.returncode != 0 or len(stderr) != 0:
+        raise HTTPException(
+            status_code=status.HTTP_400_BAD_REQUEST, detail="Can't convert!"
+        )
 
     return FileResponse(
         converted_temp_filename,
-        background=BackgroundTask(lambda: os.remove(converted_temp_filename))
+        background=BackgroundTask(lambda: os.remove(converted_temp_filename)),
     )
 
 
diff --git a/docker/build.dockerfile b/docker/build.dockerfile
index 828d7b4..8ad4577 100644
--- a/docker/build.dockerfile
+++ b/docker/build.dockerfile
@@ -10,9 +10,13 @@ ADD https://github.com/rupor-github/fb2converter/releases/download/v1.59.0/fb2c_
 RUN unzip fb2c_linux_amd64.zip
 
 # Install requirements
-WORKDIR /root/temp
+WORKDIR /root/poetry
+COPY pyproject.toml poetry.lock /root/poetry/
+
+RUN pip install poetry --no-cache-dir \
+    && poetry export --without-hashes > requirements.txt
+
 ENV VENV_PATH=/opt/venv
-COPY ./requirements.txt ./
 RUN python -m venv $VENV_PATH \
     && . /opt/venv/bin/activate \
     && pip install -r requirements.txt --no-cache-dir
diff --git a/poetry.lock b/poetry.lock
new file mode 100644
index 0000000..9fa0b77
--- /dev/null
+++ b/poetry.lock
@@ -0,0 +1,267 @@
+[[package]]
+name = "aiofiles"
+version = "0.8.0"
+description = "File support for asyncio."
+category = "main"
+optional = false
+python-versions = ">=3.6,<4.0"
+
+[[package]]
+name = "anyio"
+version = "3.4.0"
+description = "High level compatibility layer for multiple asynchronous event loop implementations"
+category = "main"
+optional = false
+python-versions = ">=3.6.2"
+
+[package.dependencies]
+idna = ">=2.8"
+sniffio = ">=1.1"
+
+[package.extras]
+doc = ["sphinx-rtd-theme", "sphinx-autodoc-typehints (>=1.2.0)"]
+test = ["coverage[toml] (>=4.5)", "hypothesis (>=4.0)", "pytest (>=6.0)", "pytest-mock (>=3.6.1)", "trustme", "contextlib2", "uvloop (<0.15)", "mock (>=4)", "uvloop (>=0.15)"]
+trio = ["trio (>=0.16)"]
+
+[[package]]
+name = "asgiref"
+version = "3.4.1"
+description = "ASGI specs, helper code, and adapters"
+category = "main"
+optional = false
+python-versions = ">=3.6"
+
+[package.extras]
+tests = ["pytest", "pytest-asyncio", "mypy (>=0.800)"]
+
+[[package]]
+name = "click"
+version = "8.0.3"
+description = "Composable command line interface toolkit"
+category = "main"
+optional = false
+python-versions = ">=3.6"
+
+[package.dependencies]
+colorama = {version = "*", markers = "platform_system == \"Windows\""}
+
+[[package]]
+name = "colorama"
+version = "0.4.4"
+description = "Cross-platform colored terminal text."
+category = "main"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
+
+[[package]]
+name = "fastapi"
+version = "0.70.1"
+description = "FastAPI framework, high performance, easy to learn, fast to code, ready for production"
+category = "main"
+optional = false
+python-versions = ">=3.6.1"
+
+[package.dependencies]
+pydantic = ">=1.6.2,<1.7 || >1.7,<1.7.1 || >1.7.1,<1.7.2 || >1.7.2,<1.7.3 || >1.7.3,<1.8 || >1.8,<1.8.1 || >1.8.1,<2.0.0"
+starlette = "0.16.0"
+
+[package.extras]
+all = ["requests (>=2.24.0,<3.0.0)", "jinja2 (>=2.11.2,<4.0.0)", "python-multipart (>=0.0.5,<0.0.6)", "itsdangerous (>=1.1.0,<3.0.0)", "pyyaml (>=5.3.1,<6.0.0)", "ujson (>=4.0.1,<5.0.0)", "orjson (>=3.2.1,<4.0.0)", "email_validator (>=1.1.1,<2.0.0)", "uvicorn[standard] (>=0.12.0,<0.16.0)"]
+dev = ["python-jose[cryptography] (>=3.3.0,<4.0.0)", "passlib[bcrypt] (>=1.7.2,<2.0.0)", "autoflake (>=1.4.0,<2.0.0)", "flake8 (>=3.8.3,<4.0.0)", "uvicorn[standard] (>=0.12.0,<0.16.0)"]
+doc = ["mkdocs (>=1.1.2,<2.0.0)", "mkdocs-material (>=7.1.9,<8.0.0)", "mdx-include (>=1.4.1,<2.0.0)", "mkdocs-markdownextradata-plugin (>=0.1.7,<0.3.0)", "typer-cli (>=0.0.12,<0.0.13)", "pyyaml (>=5.3.1,<6.0.0)"]
+test = ["pytest (>=6.2.4,<7.0.0)", "pytest-cov (>=2.12.0,<4.0.0)", "mypy (==0.910)", "flake8 (>=3.8.3,<4.0.0)", "black (==21.9b0)", "isort (>=5.0.6,<6.0.0)", "requests (>=2.24.0,<3.0.0)", "httpx (>=0.14.0,<0.19.0)", "email_validator (>=1.1.1,<2.0.0)", "sqlalchemy (>=1.3.18,<1.5.0)", "peewee (>=3.13.3,<4.0.0)", "databases[sqlite] (>=0.3.2,<0.6.0)", "orjson (>=3.2.1,<4.0.0)", "ujson (>=4.0.1,<5.0.0)", "python-multipart (>=0.0.5,<0.0.6)", "flask (>=1.1.2,<3.0.0)", "anyio[trio] (>=3.2.1,<4.0.0)", "types-ujson (==0.1.1)", "types-orjson (==3.6.0)", "types-dataclasses (==0.1.7)"]
+
+[[package]]
+name = "h11"
+version = "0.12.0"
+description = "A pure-Python, bring-your-own-I/O implementation of HTTP/1.1"
+category = "main"
+optional = false
+python-versions = ">=3.6"
+
+[[package]]
+name = "idna"
+version = "3.3"
+description = "Internationalized Domain Names in Applications (IDNA)"
+category = "main"
+optional = false
+python-versions = ">=3.5"
+
+[[package]]
+name = "pydantic"
+version = "1.9.0"
+description = "Data validation and settings management using python 3.6 type hinting"
+category = "main"
+optional = false
+python-versions = ">=3.6.1"
+
+[package.dependencies]
+typing-extensions = ">=3.7.4.3"
+
+[package.extras]
+dotenv = ["python-dotenv (>=0.10.4)"]
+email = ["email-validator (>=1.0.3)"]
+
+[[package]]
+name = "python-multipart"
+version = "0.0.5"
+description = "A streaming multipart parser for Python"
+category = "main"
+optional = false
+python-versions = "*"
+
+[package.dependencies]
+six = ">=1.4.0"
+
+[[package]]
+name = "six"
+version = "1.16.0"
+description = "Python 2 and 3 compatibility utilities"
+category = "main"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*"
+
+[[package]]
+name = "sniffio"
+version = "1.2.0"
+description = "Sniff out which async library your code is running under"
+category = "main"
+optional = false
+python-versions = ">=3.5"
+
+[[package]]
+name = "starlette"
+version = "0.16.0"
+description = "The little ASGI library that shines."
+category = "main"
+optional = false
+python-versions = ">=3.6"
+
+[package.dependencies]
+anyio = ">=3.0.0,<4"
+
+[package.extras]
+full = ["itsdangerous", "jinja2", "python-multipart", "pyyaml", "requests", "graphene"]
+
+[[package]]
+name = "typing-extensions"
+version = "4.0.1"
+description = "Backported and Experimental Type Hints for Python 3.6+"
+category = "main"
+optional = false
+python-versions = ">=3.6"
+
+[[package]]
+name = "uvicorn"
+version = "0.16.0"
+description = "The lightning-fast ASGI server."
+category = "main"
+optional = false
+python-versions = "*"
+
+[package.dependencies]
+asgiref = ">=3.4.0"
+click = ">=7.0"
+h11 = ">=0.8"
+
+[package.extras]
+standard = ["httptools (>=0.2.0,<0.4.0)", "watchgod (>=0.6)", "python-dotenv (>=0.13)", "PyYAML (>=5.1)", "websockets (>=9.1)", "websockets (>=10.0)", "uvloop (>=0.14.0,!=0.15.0,!=0.15.1)", "colorama (>=0.4)"]
+
+[metadata]
+lock-version = "1.1"
+python-versions = "^3.9"
+content-hash = "cba6006aa6b8ea025ccecdcce2bad8402681461daeb25223d467b872d6cb4362"
+
+[metadata.files]
+aiofiles = [
+    {file = "aiofiles-0.8.0-py3-none-any.whl", hash = "sha256:7a973fc22b29e9962d0897805ace5856e6a566ab1f0c8e5c91ff6c866519c937"},
+    {file = "aiofiles-0.8.0.tar.gz", hash = "sha256:8334f23235248a3b2e83b2c3a78a22674f39969b96397126cc93664d9a901e59"},
+]
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+    {file = "anyio-3.4.0.tar.gz", hash = "sha256:24adc69309fb5779bc1e06158e143e0b6d2c56b302a3ac3de3083c705a6ed39d"},
+]
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+    {file = "asgiref-3.4.1.tar.gz", hash = "sha256:4ef1ab46b484e3c706329cedeff284a5d40824200638503f5768edb6de7d58e9"},
+]
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+]
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+]
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+]
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+    {file = "idna-3.3.tar.gz", hash = "sha256:9d643ff0a55b762d5cdb124b8eaa99c66322e2157b69160bc32796e824360e6d"},
+]
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+    {file = "pydantic-1.9.0-cp38-cp38-musllinux_1_1_x86_64.whl", hash = "sha256:5e48ef4a8b8c066c4a31409d91d7ca372a774d0212da2787c0d32f8045b1e034"},
+    {file = "pydantic-1.9.0-cp38-cp38-win_amd64.whl", hash = "sha256:96f240bce182ca7fe045c76bcebfa0b0534a1bf402ed05914a6f1dadff91877f"},
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+    {file = "pydantic-1.9.0-cp39-cp39-musllinux_1_1_i686.whl", hash = "sha256:f5a64b64ddf4c99fe201ac2724daada8595ada0d102ab96d019c1555c2d6441d"},
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+    {file = "pydantic-1.9.0-cp39-cp39-win_amd64.whl", hash = "sha256:2cc6a4cb8a118ffec2ca5fcb47afbacb4f16d0ab8b7350ddea5e8ef7bcc53a16"},
+    {file = "pydantic-1.9.0-py3-none-any.whl", hash = "sha256:085ca1de245782e9b46cefcf99deecc67d418737a1fd3f6a4f511344b613a5b3"},
+    {file = "pydantic-1.9.0.tar.gz", hash = "sha256:742645059757a56ecd886faf4ed2441b9c0cd406079c2b4bee51bcc3fbcd510a"},
+]
+python-multipart = [
+    {file = "python-multipart-0.0.5.tar.gz", hash = "sha256:f7bb5f611fc600d15fa47b3974c8aa16e93724513b49b5f95c81e6624c83fa43"},
+]
+six = [
+    {file = "six-1.16.0-py2.py3-none-any.whl", hash = "sha256:8abb2f1d86890a2dfb989f9a77cfcfd3e47c2a354b01111771326f8aa26e0254"},
+    {file = "six-1.16.0.tar.gz", hash = "sha256:1e61c37477a1626458e36f7b1d82aa5c9b094fa4802892072e49de9c60c4c926"},
+]
+sniffio = [
+    {file = "sniffio-1.2.0-py3-none-any.whl", hash = "sha256:471b71698eac1c2112a40ce2752bb2f4a4814c22a54a3eed3676bc0f5ca9f663"},
+    {file = "sniffio-1.2.0.tar.gz", hash = "sha256:c4666eecec1d3f50960c6bdf61ab7bc350648da6c126e3cf6898d8cd4ddcd3de"},
+]
+starlette = [
+    {file = "starlette-0.16.0-py3-none-any.whl", hash = "sha256:38eb24bf705a2c317e15868e384c1b8a12ca396e5a3c3a003db7e667c43f939f"},
+    {file = "starlette-0.16.0.tar.gz", hash = "sha256:e1904b5d0007aee24bdd3c43994be9b3b729f4f58e740200de1d623f8c3a8870"},
+]
+typing-extensions = [
+    {file = "typing_extensions-4.0.1-py3-none-any.whl", hash = "sha256:7f001e5ac290a0c0401508864c7ec868be4e701886d5b573a9528ed3973d9d3b"},
+    {file = "typing_extensions-4.0.1.tar.gz", hash = "sha256:4ca091dea149f945ec56afb48dae714f21e8692ef22a395223bcd328961b6a0e"},
+]
+uvicorn = [
+    {file = "uvicorn-0.16.0-py3-none-any.whl", hash = "sha256:d8c839231f270adaa6d338d525e2652a0b4a5f4c2430b5c4ef6ae4d11776b0d2"},
+    {file = "uvicorn-0.16.0.tar.gz", hash = "sha256:eacb66afa65e0648fcbce5e746b135d09722231ffffc61883d4fac2b62fbea8d"},
+]
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..0f0866d
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,58 @@
+[tool.poetry]
+name = "fb2converter_server"
+version = "0.1.0"
+description = ""
+authors = ["Kurbanov Bulat <kurbanovbul@gmail.com>"]
+
+[tool.poetry.dependencies]
+python = "^3.9"
+fastapi = "^0.70.1"
+python-multipart = "^0.0.5"
+aiofiles = "^0.8.0"
+uvicorn = {extras = ["standart"], version = "^0.16.0"}
+
+[tool.poetry.dev-dependencies]
+
+[build-system]
+requires = ["poetry-core>=1.0.0"]
+build-backend = "poetry.core.masonry.api"
+
+[tool.black]
+include = '\.pyi?$'
+exclude = '''
+/(
+    \.git
+  | \.vscode
+  | \venv
+  | alembic
+)/
+'''
+
+[tool.flake8]
+ignore = [
+    # Whitespace before ':' ( https://www.flake8rules.com/rules/E203.html )
+    "E203"
+]
+max-line-length=88
+max-complexity = 15
+select = "B,C,E,F,W,T4,B9"
+exclude = [
+    # No need to traverse our git directory
+    ".git",
+    # There's no value in checking cache directories
+    "__pycache__",
+    # The conf file is mostly autogenerated, ignore it
+    "src/app/alembic/*",
+    # The old directory contains Flake8 2.0
+]
+
+[tool.isort]
+profile = "black"
+only_sections = true
+force_sort_within_sections = true
+lines_after_imports = 2
+lexicographical = true
+sections = ["FUTURE", "STDLIB", "BASEFRAMEWORK", "FRAMEWORKEXT", "THIRDPARTY", "FIRSTPARTY", "LOCALFOLDER"]
+known_baseframework = ["fastapi",]
+known_frameworkext = ["starlette",]
+src_paths = ["app"]
diff --git a/requirements.txt b/requirements.txt
deleted file mode 100644
index 7b242bb..0000000
--- a/requirements.txt
+++ /dev/null
@@ -1,4 +0,0 @@
-fastapi
-python-multipart
-aiofiles
-uvicorn[standart]