diff --git a/deal/__init__.py b/deal/__init__.py
index 0de460de..5fec3604 100644
--- a/deal/__init__.py
+++ b/deal/__init__.py
@@ -23,7 +23,7 @@
 # app
 from ._aliases import (
     chain, ensure, inv, invariant, offline, post,
-    pre, pure, raises, reason, require, safe, silent
+    pre, pure, raises, reason, require, safe, silent,
 )
 from ._exceptions import *  # noQA
 from ._imports import activate, module_load
diff --git a/deal/_aliases.py b/deal/_aliases.py
index e5afdeea..cfead9eb 100644
--- a/deal/_aliases.py
+++ b/deal/_aliases.py
@@ -1,5 +1,4 @@
 # built-in
-from functools import partial
 from typing import Callable, TypeVar, overload
 
 # app