diff --git a/interactive_runner/assignment.py b/interactive_runner/assignment.py
index 7020ca8..edd883a 100644
--- a/interactive_runner/assignment.py
+++ b/interactive_runner/assignment.py
@@ -3,10 +3,11 @@ from __future__ import annotations
 __all__ = ("Assignment",)
 
 from functools import cached_property
-from .helpers import command
 from tomllib import loads as decode_toml
 from typing import TYPE_CHECKING, TypedDict
 
+from .helpers import command
+
 if TYPE_CHECKING:
     from pathlib import Path
     from .language import Language
diff --git a/sources/c/language.toml b/sources/c/language.toml
index 5d2b2ba..7416966 100644
--- a/sources/c/language.toml
+++ b/sources/c/language.toml
@@ -12,4 +12,4 @@ common = "gcc -o {out} {main}"
 common = "{}"
 
 [dependency]
-common = [ "gcc" ]
+common = ["gcc"]
diff --git a/sources/cpython/language.toml b/sources/cpython/language.toml
index e807834..cd47db6 100644
--- a/sources/cpython/language.toml
+++ b/sources/cpython/language.toml
@@ -10,5 +10,5 @@ unix = "python3 {}"
 windows = "py {}"
 
 [dependencies]
-unix = [ "python3" ]
-windows = [ "py" ]
+unix = ["python3"]
+windows = ["py"]