diff --git a/Changelog.rst b/Changelog.rst
index c7bb347..51b62d0 100644
--- a/Changelog.rst
+++ b/Changelog.rst
@@ -5,6 +5,7 @@ Changelog
 ------------------
 
 * Drop support for Python 3.6
+* Drop dependency on `attr`
 
 6.6.1 (2021-12-17)
 ------------------
diff --git a/poetry.lock b/poetry.lock
index e0c0802..6000833 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -10,7 +10,7 @@ python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 name = "attrs"
 version = "21.2.0"
 description = "Classes Without Boilerplate"
-category = "main"
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 
@@ -574,7 +574,7 @@ testing = ["pytest (>=4.6)", "pytest-checkdocs (>=2.4)", "pytest-flake8", "pytes
 [metadata]
 lock-version = "1.1"
 python-versions = "^3.7"
-content-hash = "e7bf84414b86de359f6162a29dd3c4d52a9c85db79f72c30017d1bac1b59be29"
+content-hash = "ba50222af5b296f705a33bb005a96200f49eef2623c408930b4de282b74bdcc7"
 
 [metadata.files]
 atomicwrites = [
diff --git a/pyproject.toml b/pyproject.toml
index db403d1..6cfd5d6 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -18,7 +18,6 @@ Issues = "https://github.com/dmerejkowsky/tbump/issues"
 # Note: keep this in sync with .github/workflows/tests.yml
 python = "^3.7"
 
-attrs = ">= 20.0.0"
 docopt = "^0.6.2"
 cli-ui = ">=0.10.3"
 schema = "^0.7.1"
diff --git a/tbump/cli.py b/tbump/cli.py
index 3ca77cf..d880aa4 100644
--- a/tbump/cli.py
+++ b/tbump/cli.py
@@ -1,10 +1,10 @@
 import sys
 import textwrap
 import urllib.parse
+from dataclasses import dataclass
 from pathlib import Path
 from typing import List, Optional
 
-import attr
 import cli_ui as ui
 import docopt
 
@@ -47,13 +47,13 @@ def print_error(self) -> None:
         ui.error("Canceled by user")
 
 
-@attr.s
+@dataclass
 class BumpOptions:
-    working_path: Path = attr.ib()
-    new_version: str = attr.ib()
-    interactive: bool = attr.ib(default=True)
-    dry_run: bool = attr.ib(default=False)
-    config_path: Optional[Path] = attr.ib(default=None)
+    working_path: Path
+    new_version: str
+    interactive: bool = True
+    dry_run: bool = False
+    config_path: Optional[Path] = None
 
 
 def run(cmd: List[str]) -> None:
diff --git a/tbump/config.py b/tbump/config.py
index a58ec84..f80f6ff 100644
--- a/tbump/config.py
+++ b/tbump/config.py
@@ -1,9 +1,9 @@
 import abc
 import re
+from dataclasses import dataclass
 from pathlib import Path
 from typing import Dict, List, Optional, Pattern, Tuple, Union
 
-import attr
 import cli_ui as ui
 import schema
 import tomlkit
@@ -13,32 +13,32 @@
 from tbump.hooks import HOOKS_CLASSES, Hook
 
 
-@attr.s
+@dataclass
 class File:
-    src: str = attr.ib()
-    search: Optional[str] = attr.ib(default=None)
-    version_template: Optional[str] = attr.ib(default=None)
+    src: str
+    search: Optional[str] = None
+    version_template: Optional[str] = None
 
 
-@attr.s
+@dataclass
 class Field:
-    name: str = attr.ib()
-    default: Optional[Union[str, int]] = attr.ib(default=None)
+    name: str
+    default: Optional[Union[str, int]] = None
 
 
-@attr.s
+@dataclass
 class Config:
-    current_version: str = attr.ib()
-    version_regex: Pattern[str] = attr.ib()
+    current_version: str
+    version_regex: Pattern[str]
 
-    git_tag_template: str = attr.ib()
-    git_message_template: str = attr.ib()
+    git_tag_template: str
+    git_message_template: str
 
-    files: List[File] = attr.ib()
-    hooks: List[Hook] = attr.ib()
-    fields: List[Field] = attr.ib()
+    files: List[File]
+    hooks: List[Hook]
+    fields: List[Field]
 
-    github_url: Optional[str] = attr.ib()
+    github_url: Optional[str]
 
 
 class ConfigFile(metaclass=abc.ABCMeta):
diff --git a/tbump/file_bumper.py b/tbump/file_bumper.py
index bfdd5ac..35bb4f1 100644
--- a/tbump/file_bumper.py
+++ b/tbump/file_bumper.py
@@ -1,9 +1,9 @@
 import glob
 import re
+from dataclasses import dataclass
 from pathlib import Path
 from typing import Dict, List, Optional, Pattern
 
-import attr
 import cli_ui as ui
 
 from tbump.action import Action
@@ -11,12 +11,12 @@
 from tbump.error import Error
 
 
-@attr.s
+@dataclass
 class ChangeRequest:
-    src: str = attr.ib()
-    old_string: str = attr.ib()
-    new_string: str = attr.ib()
-    search: Optional[str] = attr.ib(default=None)
+    src: str
+    old_string: str
+    new_string: str
+    search: Optional[str] = None
 
 
 class Patch(Action):