diff --git a/.dockerignore b/.dockerignore
index 765f5a5..4bcba1f 100644
--- a/.dockerignore
+++ b/.dockerignore
@@ -1,9 +1,8 @@
-*
-!/src
+**/*
+
+!/src/**/*.py
 !/uv.lock
 !/pyproject.toml
 !/accents
-!/accents2
+!/accents2/
 !/schema.sql
-
-**/__pycache__
diff --git a/.gitignore b/.gitignore
index 1b06e14..3be7559 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,11 +6,10 @@ settings.toml
 !/example.settings.toml
 
 # cache
-__pycache__
+__pycache__/
 /target
-/.venv
-/.mypy_cache
-/.pytest_cache
+/.venv/
+*.egg-info/
 
 # db
 /pink.db
diff --git a/Dockerfile b/Dockerfile
index 1d5b67f..1610ff2 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -25,8 +25,7 @@ RUN : \
         gifsicle \
         # Font for trocr
         ttf-dejavu \
-    && uv sync --frozen --no-cache \
-    && rm uv.lock pyproject.toml \
+    && uv sync --frozen --no-cache --no-dev \
     && rm /bin/uv
 
 COPY --from=accents_builder /build/target/release/sayit /usr/bin/sayit
@@ -48,5 +47,6 @@ RUN addgroup -g $GID -S pink \
 USER pink
 
 COPY --chown=pink:pink . .
+RUN rm uv.lock pyproject.toml
 
 ENTRYPOINT ["/code/.venv/bin/python", "-m", "src"]
diff --git a/pyproject.toml b/pyproject.toml
index 5f1c73f..6cd4a90 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -52,9 +52,6 @@ select = [
     "N",
     # pyupgrade
     "UP",
-    # flake8-bandit
-    # most rules are stupid
-    # "S",
     # flake8-comprehensions
     "C4",
     # flake8-logging-format
@@ -67,6 +64,10 @@ select = [
     "RUF",
     # flake8-unused-arguments
     "ARG",
+    # perflint
+    "PERF",
+    # refurb
+    "FURB",
 ]
 fixable = [
     "I"
diff --git a/src/bot.py b/src/bot.py
index 871665d..41699f1 100644
--- a/src/bot.py
+++ b/src/bot.py
@@ -27,7 +27,7 @@
 def mention_or_prefix_regex(user_id: int, prefix: str) -> re.Pattern[str]:
     choices = [re.escape(prefix), rf"<@!?{user_id}>"]
 
-    return re.compile(rf"(?:{'|'.join(choices)})\s*", re.I)
+    return re.compile(rf"(?:{'|'.join(choices)})\s*", re.IGNORECASE)
 
 
 class Prefix:
diff --git a/src/cogs/fun.py b/src/cogs/fun.py
index 33e01af..fe9be0b 100644
--- a/src/cogs/fun.py
+++ b/src/cogs/fun.py
@@ -4,7 +4,7 @@
 
 from collections import defaultdict
 from collections.abc import Iterable
-from datetime import datetime, timezone
+from datetime import UTC, datetime
 from typing import Optional
 
 import discord
@@ -33,7 +33,7 @@ async def convert(cls, _: Context, argument: str) -> datetime:
             except ValueError:
                 continue
 
-            return parsed.replace(tzinfo=timezone.utc)
+            return parsed.replace(tzinfo=UTC)
 
         raise ValueError("Could not parse date")
 
@@ -294,10 +294,13 @@ async def scramble2(self, ctx: Context, *, text: Optional[str]) -> None:
             indexes = [i for i, _ in group]
             group_words = [w for _, w in group]
 
-            for i, word in zip(indexes, random.sample(group_words, k=len(group_words))):
+            for i, word in zip(indexes, random.sample(group_words, k=len(group_words)), strict=True):
                 # replace and copy case for each letter from old value
                 words[i] = "".join(
-                    [c_new.upper() if c_old.isupper() else c_new.lower() for c_new, c_old in zip(word, words[i])]
+                    [
+                        c_new.upper() if c_old.isupper() else c_new.lower()
+                        for c_new, c_old in zip(word, words[i], strict=True)
+                    ]
                 )
 
         first, second = (words, nonwords) if word_was_first else (nonwords, words)
diff --git a/src/cogs/images/flies.py b/src/cogs/images/flies.py
index 709a9e3..bf41101 100644
--- a/src/cogs/images/flies.py
+++ b/src/cogs/images/flies.py
@@ -228,9 +228,7 @@ def draw_flies(
     speed: int,
     amount: int,
 ) -> Path:
-    flies = []
-    for _ in range(amount):
-        flies.append(Fly(speed=speed))
+    flies = [Fly(speed=speed) for _ in range(amount)]
 
     filename = FlyDrawer(src, flies, steps=steps, fly_src=fly_src).run()
     src.close()
diff --git a/src/cogs/images/types.py b/src/cogs/images/types.py
index 3268ed6..1b01856 100644
--- a/src/cogs/images/types.py
+++ b/src/cogs/images/types.py
@@ -1,11 +1,9 @@
 from __future__ import annotations
 
-import asyncio
 import base64
 import re
 import warnings
 
-from asyncio import TimeoutError
 from enum import Enum, auto
 from io import BytesIO
 from typing import Any, Literal, Optional
@@ -448,7 +446,7 @@ async def _fetch(
         max_content_length: int = 8000000,
     ) -> bytes:
         try:
-            async with ctx.session.get(url, timeout=timeout) as r:
+            async with ctx.session.get(url, timeout=aiohttp.ClientTimeout(total=timeout)) as r:
                 if r.status != 200:
                     raise PINKError(f"bad status code: **{r.status}**")
 
@@ -470,7 +468,7 @@ async def _fetch(
                 return await r.read()
         except PINKError:
             raise
-        except (Exception, asyncio.TimeoutError) as e:
+        except (Exception, TimeoutError) as e:
             error = "Download error: "
             if isinstance(e, TimeoutError):
                 error += f"timeout reached: **{timeout}s**"