diff --git a/mdit_py_plugins/amsmath/__init__.py b/mdit_py_plugins/amsmath/__init__.py
index d2f71ca..8c9f1a1 100644
--- a/mdit_py_plugins/amsmath/__init__.py
+++ b/mdit_py_plugins/amsmath/__init__.py
@@ -1,4 +1,5 @@
 """An extension to capture amsmath latex environments."""
+
 from __future__ import annotations
 
 import re
diff --git a/mdit_py_plugins/attrs/parse.py b/mdit_py_plugins/attrs/parse.py
index 6b03117..06539c2 100644
--- a/mdit_py_plugins/attrs/parse.py
+++ b/mdit_py_plugins/attrs/parse.py
@@ -19,6 +19,7 @@ class <- '.' name
 bareval <- (ASCII_ALPHANUM | ':' | '_' | '-')+
 quotedval <- '"' ([^"] | '\"') '"'
 """
+
 from __future__ import annotations
 
 from enum import Enum
diff --git a/mdit_py_plugins/container/index.py b/mdit_py_plugins/container/index.py
index 454aa0e..61a7b03 100644
--- a/mdit_py_plugins/container/index.py
+++ b/mdit_py_plugins/container/index.py
@@ -1,4 +1,5 @@
 """Process block-level custom containers."""
+
 from __future__ import annotations
 
 from math import floor
diff --git a/mdit_py_plugins/deflist/index.py b/mdit_py_plugins/deflist/index.py
index dd8a47b..f5d20d1 100644
--- a/mdit_py_plugins/deflist/index.py
+++ b/mdit_py_plugins/deflist/index.py
@@ -1,4 +1,5 @@
 """Process definition lists."""
+
 from markdown_it import MarkdownIt
 from markdown_it.rules_block import StateBlock
 
diff --git a/mdit_py_plugins/field_list/__init__.py b/mdit_py_plugins/field_list/__init__.py
index 50bb907..6472cfd 100644
--- a/mdit_py_plugins/field_list/__init__.py
+++ b/mdit_py_plugins/field_list/__init__.py
@@ -1,4 +1,5 @@
 """Field list plugin"""
+
 from contextlib import contextmanager
 from typing import Iterator, Optional, Tuple
 
diff --git a/mdit_py_plugins/footnote/index.py b/mdit_py_plugins/footnote/index.py
index 6dc3602..fad0539 100644
--- a/mdit_py_plugins/footnote/index.py
+++ b/mdit_py_plugins/footnote/index.py
@@ -1,4 +1,5 @@
 """Process footnotes"""
+
 from __future__ import annotations
 
 from typing import TYPE_CHECKING, List, Optional, Sequence
diff --git a/mdit_py_plugins/front_matter/index.py b/mdit_py_plugins/front_matter/index.py
index 7ae67a8..1551d76 100644
--- a/mdit_py_plugins/front_matter/index.py
+++ b/mdit_py_plugins/front_matter/index.py
@@ -1,4 +1,5 @@
 """Process front matter."""
+
 from markdown_it import MarkdownIt
 from markdown_it.rules_block import StateBlock