diff --git a/.drone.yml b/.drone.yml
index ece0773..667aefa 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -4,8 +4,26 @@ type: docker
 name: default
 
 steps:
-  - name: lint
+  - name: flake8
     image: python:3-alpine
+    depends_on:
+      - clone
     commands:
       - pip install -r requirements-dev.txt
-      - flake8 .
+      - flake8 breadbot
+
+  - name: isort
+    image: python:3-alpine
+    depends_on:
+      - clone
+    commands:
+      - pip install -r requirements-dev.txt
+      - isort --check --diff breadbot
+
+  - name: mypy
+    image: python:3-alpine
+    depends_on:
+      - clone
+    commands:
+      - pip install -r requirements-dev.txt
+      - mypy breadbot
diff --git a/README.rst b/README.rst
index 79362c6..73b8a32 100644
--- a/README.rst
+++ b/README.rst
@@ -4,6 +4,9 @@ breadbot
 A Python IRC bot built using the `pinhook`_ framework to encourage
 addiction to bread on breadpunk's own irc server.
 
+.. image:: https://drone.tildegit.org/api/badges/breadpunk/breadbot/status.svg
+   :target: https://drone.tildegit.org/breadpunk/breadbot
+
 Data files
 ----------
 
diff --git a/breadbot/__main__.py b/breadbot/__main__.py
index 5926e19..9c683f9 100644
--- a/breadbot/__main__.py
+++ b/breadbot/__main__.py
@@ -1,22 +1,23 @@
 #!/usr/bin/env python3
 import argparse
 import re
+
 import yaml
-from irc.client import NickMask
-from pinhook import plugin, bot
+from irc.client import Event, NickMask, ServerConnection  # type: ignore
+from pinhook import bot, plugin  # type: ignore
 
 RELAY_REGEX = re.compile(r'^<([^@]+@(?:tilde|bread))>\s?(.*)$')
 
 
 class BreadBot(bot.Bot):
 
-    def on_welcome(self, c, e):
+    def on_welcome(self, c: ServerConnection, e: Event) -> None:
         c.mode(self.bot_nick, '+B')
         super().on_welcome(c, e)
         for channel in self.chanlist:
             self.process_output(c, channel, plugin.message('bread'))
 
-    def process_event(self, c, e):
+    def process_event(self, c: ServerConnection, e: Event) -> None:
         # Handle BreadRelay by suppressing it
         if e.source.nick == 'BreadRelay' and e.arguments:
             match = RELAY_REGEX.match(e.arguments[0])
@@ -30,12 +31,10 @@ class BreadBot(bot.Bot):
         if e.source.nick == self.bot_nick:
             return
 
-        print(e.source, e.arguments)
-
         return super().process_event(c, e)
 
 
-def main():
+def main() -> None:
     parser = argparse.ArgumentParser(
         description='Breadpunk Bread Bot',
     )
diff --git a/breadbot/plugins/bread.py b/breadbot/plugins/bread.py
index 8468d01..4811812 100644
--- a/breadbot/plugins/bread.py
+++ b/breadbot/plugins/bread.py
@@ -1,8 +1,11 @@
-from pinhook import plugin
-from pathlib import Path
 import logging
-import re
 import random
+import re
+from pathlib import Path
+from typing import Optional
+
+from pinhook import plugin  # type: ignore
+from pinhook.bot import Bot  # type: ignore
 
 logger = logging.getLogger(__name__)
 
@@ -13,7 +16,7 @@ messages_file = data_path / 'bread_messages.txt'
 word_regex = re.compile(r'\W')
 
 
-def get_that_bread():
+def get_that_bread() -> str:
     try:
         bread_messages = messages_file.read_text().strip().splitlines()
         assert bread_messages
@@ -27,7 +30,7 @@ def get_that_bread():
     return random.choice(bread_messages)
 
 
-def increment_bread():
+def increment_bread() -> None:
     try:
         count = int(count_file.read_text().strip())
     except (IOError, TypeError, ValueError):
@@ -39,12 +42,13 @@ def increment_bread():
 
 
 @plugin.listener('bread')
-def bread(ctx):
+def bread(ctx: Bot.Message) -> Optional[plugin.Output]:
     words = set(word_regex.split(ctx.text.lower()))
     if 'bread' in words:
         increment_bread()
     if words == {'bread'}:
         return plugin.message(get_that_bread())
+    return None
 
 
 @plugin.command(
@@ -53,7 +57,7 @@ def bread(ctx):
     ops=True,
     ops_msg='This command is restricted to breadpunk admins.'
 )
-def nukethebread(ctx):
+def nukethebread(ctx: Bot.Message) -> plugin.Output:
     count_file.write_text('0')
     return plugin.message('Bread count has been reset.')
 
@@ -62,7 +66,7 @@ def nukethebread(ctx):
     '!breadcount',
     help_text='How many times did bakers say bread here?',
 )
-def breadcount(ctx):
+def breadcount(ctx: Bot.Message) -> plugin.Output:
     try:
         count = int(count_file.read_text().strip())
     except (IOError, TypeError, ValueError):
diff --git a/requirements-dev.txt b/requirements-dev.txt
index 8d7f646..daf1f63 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -1 +1,4 @@
-flake8>=3.7
+flake8~=3.9
+isort>=5.9
+mypy~=0.910
+types-PyYAML~=5.4.3
diff --git a/setup.cfg b/setup.cfg
index b963157..bb047c3 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,5 +1,11 @@
 [flake8]
-exclude = .git,__pycache__,docs,*.pyc,venv
+exclude=build,.cache,.eggs,.git,breadbot.egg-info,lib,bin
+# Override the errors that Flake8 ignores by default to lint very hard.
+# Only ignore W503, which is deprecated and conflicts with W504.
+ignore=W503
 
-[doc8]
-ignore-path=**/*.txt,*.txt,*.egg-info,docs/_build,venv,.git
+[mypy]
+disallow_incomplete_defs=True
+disallow_untyped_defs=True
+check_untyped_defs=True
+no_implicit_optional=True