diff --git a/plugin/data_types.py b/plugin/data_types.py
index 38e86b8..0d144da 100644
--- a/plugin/data_types.py
+++ b/plugin/data_types.py
@@ -12,6 +12,7 @@
 
 POINT = int
 TUPLE_REGION = Tuple[POINT, POINT]
+INDENT_LEVEL = int
 
 if sys.version_info >= (3, 11):
     from enum import StrEnum
diff --git a/plugin/view_manager.py b/plugin/view_manager.py
index 8b502c7..f81a467 100644
--- a/plugin/view_manager.py
+++ b/plugin/view_manager.py
@@ -6,7 +6,7 @@
 
 import sublime
 
-from .data_types import IndentInfo, LevelStyle
+from .data_types import INDENT_LEVEL, IndentInfo, LevelStyle
 from .helpers import get_regions_key
 from .indent_renderer import AbstractIndentRenderer, find_indent_renderer
 from .settings import get_level_colors, get_level_style
@@ -17,7 +17,7 @@ def calcualte_level_regions(
     *,
     indent_info: IndentInfo | None = None,
     regions: Sequence[sublime.Region] | None = None,
-) -> defaultdict[int, list[sublime.Region]]:
+) -> defaultdict[INDENT_LEVEL, list[sublime.Region]]:
     """
     Calculates regions of indents for each level.
 
@@ -36,7 +36,7 @@ def calcualte_level_regions(
         regions = (sublime.Region(0, view.size()),)
 
     whole_content = view.substr(sublime.Region(0, view.size()))
-    level_regions: defaultdict[int, list[sublime.Region]] = defaultdict(list)
+    level_regions: defaultdict[INDENT_LEVEL, list[sublime.Region]] = defaultdict(list)
     for region in regions:
         for m in indent_info.indent_pattern_compiled.finditer(whole_content, region.begin(), region.end()):
             for level, level_pt in enumerate(range(m.start(), m.end(), indent_info.indent_length)):