diff --git a/.github/workflows/pull-request.yaml b/.github/workflows/pull-request.yaml
index c6b6e83..ca9c00c 100644
--- a/.github/workflows/pull-request.yaml
+++ b/.github/workflows/pull-request.yaml
@@ -23,7 +23,7 @@ jobs:
           - windows-latest
           - macos-latest
         python-version:
-          - "3.9"
+          - "3.10"
           - "3.12"
     steps:
       - name: Checkout
diff --git a/pyproject.toml b/pyproject.toml
index f78f320..1207575 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -94,9 +94,20 @@ requires = ["poetry-core>=1.3.0"]
 
 [tool.ruff]
 fix = true
-lint.ignore = [
-  # Line length — black handles
-  "E5", #
-  # No lambdas — too strict
-  "E731",
+[tool.ruff.lint]
+# E402: module level import not at top of file
+# E501: line too long - let black worry about that
+# E731: do not assign a lambda expression, use a def
+extend-safe-fixes = [
+  "TID252", # absolute imports
+]
+ignore = ["E402", "E501", "E731", "UP007"]
+extend-select = [
+  "B",   # flake8-bugbear
+  "F",   # Pyflakes
+  "E",   # Pycodestyle
+  "W",
+  "TID", # flake8-tidy-imports (absolute imports)
+  "I",   # isort
+  "UP",  # Pyupgrade
 ]
diff --git a/pyprql/magic/prql.py b/pyprql/magic/prql.py
index 7e97584..f6afc5b 100644
--- a/pyprql/magic/prql.py
+++ b/pyprql/magic/prql.py
@@ -2,13 +2,14 @@
 
 from __future__ import annotations
 
+import re
+
 from IPython.core.magic import cell_magic, line_magic, magics_class, needs_local_scope
 from IPython.core.magic_arguments import argument, magic_arguments, parse_argstring
-from prqlc import compile, CompileOptions
+from prqlc import CompileOptions, compile
 from sql.magic import SqlMagic
 from sql.parse import parse
 from traitlets import Bool, Unicode
-import re
 
 
 @magics_class
@@ -110,7 +111,7 @@ def prql(
             _pattern = re.sub(r"\\\s", r"\\s+", _escaped_prql)
             line = re.sub(_pattern, "", line)
         if self.args.file:
-            with open(self.args.file, "r") as infile:
+            with open(self.args.file) as infile:
                 cell = infile.read()
             line = re.sub(r"(\-f|\-\-file)\s+" + self.args.file, "", line)
         # If cell is occupied, parsed to SQL
diff --git a/pyprql/polars_namespace/prql.py b/pyprql/polars_namespace/prql.py
index 4b0c1c0..e7a34ae 100644
--- a/pyprql/polars_namespace/prql.py
+++ b/pyprql/polars_namespace/prql.py
@@ -1,9 +1,9 @@
 from __future__ import annotations
-import polars as pl
-import prqlc
 
-from typing import TypeVar, Generic
+from typing import Generic, TypeVar
 
+import polars as pl
+import prqlc
 
 T_DF = TypeVar("T_DF", pl.DataFrame, pl.LazyFrame)
 
@@ -12,7 +12,7 @@
 @pl.api.register_lazyframe_namespace("prql")
 class PrqlNamespace(Generic[T_DF]):
     def __init__(self, df: T_DF):
-        self._df = df
+        self._df: T_DF = df
 
     def query(self, prql_query: str, *, table_name: str | None = None) -> T_DF:
         prepended_query: str = f"from self \n {prql_query}"
diff --git a/pyprql/tests/__init__.py b/pyprql/tests/__init__.py
index 36acc02..96a803a 100644
--- a/pyprql/tests/__init__.py
+++ b/pyprql/tests/__init__.py
@@ -8,7 +8,7 @@ def run_sql(ip_session: "IPython.core.interactiveshell.InteractiveShell", statem
     if isinstance(statements, str):
         statements = [statements]
     for statement in statements:
-        result = ip_session.run_line_magic("sql", "sqlite:// %s" % statement)
+        result = ip_session.run_line_magic("sql", f"sqlite:// {statement}")
     return result  # returns only last result
 
 
@@ -16,5 +16,5 @@ def run_prql(ip_session: "IPython.core.interactiveshell.InteractiveShell", state
     if isinstance(statements, str):
         statements = [statements]
     for statement in statements:
-        result = ip_session.run_line_magic("prql", "sqlite:// %s" % statement)
+        result = ip_session.run_line_magic("prql", f"sqlite:// {statement}")
     return result  # returns only last result
diff --git a/pyprql/tests/conftest.py b/pyprql/tests/conftest.py
index 78b3151..c2f6f80 100644
--- a/pyprql/tests/conftest.py
+++ b/pyprql/tests/conftest.py
@@ -3,8 +3,7 @@
 from pathlib import Path
 
 import pytest
-from sql import connection
-from sql import _current
+from sql import _current, connection
 from sql._testing import TestingShell
 from sql.connection import ConnectionManager
 from sql.magic import RenderMagic, SqlMagic