diff --git a/roentgen/constructor.py b/roentgen/constructor.py
index d114ebf..7700d84 100644
--- a/roentgen/constructor.py
+++ b/roentgen/constructor.py
@@ -132,7 +132,7 @@ class Constructor:
         check_level=lambda x: True,
         mode: str = "normal",
         seed: str = "",
-    ):
+    ) -> None:
         self.check_level = check_level
         self.mode: str = mode
         self.seed: str = seed
diff --git a/roentgen/direction.py b/roentgen/direction.py
index 0be51b5..3bec4ce 100644
--- a/roentgen/direction.py
+++ b/roentgen/direction.py
@@ -62,7 +62,7 @@ class Sector:
     Sector described by two vectors.
     """
 
-    def __init__(self, text: str, angle: Optional[float] = None):
+    def __init__(self, text: str, angle: Optional[float] = None) -> None:
         """
         :param text: sector text representation (e.g. "70-210", "N-NW")
         :param angle: angle in degrees
@@ -130,7 +130,7 @@ class DirectionSet:
     Describes direction, set of directions.
     """
 
-    def __init__(self, text: str):
+    def __init__(self, text: str) -> None:
         """
         :param text: direction tag value
         """
diff --git a/roentgen/drawing.py b/roentgen/drawing.py
index e71f282..623f8fb 100644
--- a/roentgen/drawing.py
+++ b/roentgen/drawing.py
@@ -60,7 +60,7 @@ class Drawing:
     Image.
     """
 
-    def __init__(self, file_path: Path, width: int, height: int):
+    def __init__(self, file_path: Path, width: int, height: int) -> None:
         self.file_path: Path = file_path
         self.width: int = width
         self.height: int = height
@@ -89,7 +89,7 @@ class SVGDrawing(Drawing):
     SVG image.
     """
 
-    def __init__(self, file_path: Path, width: int, height: int):
+    def __init__(self, file_path: Path, width: int, height: int) -> None:
         super().__init__(file_path, width, height)
         self.image = svgwrite.Drawing(str(file_path), (width, height))
 
@@ -131,7 +131,7 @@ class PNGDrawing(Drawing):
     PNG image.
     """
 
-    def __init__(self, file_path: Path, width: int, height: int):
+    def __init__(self, file_path: Path, width: int, height: int) -> None:
         super().__init__(file_path, width, height)
         self.surface = cairo.ImageSurface(cairo.FORMAT_ARGB32, width, height)
         self.context = cairo.Context(self.surface)
diff --git a/roentgen/figure.py b/roentgen/figure.py
index 022b745..8dc4207 100644
--- a/roentgen/figure.py
+++ b/roentgen/figure.py
@@ -28,7 +28,7 @@ class Figure(Tagged):
         tags: Dict[str, str],
         inners: List[List[OSMNode]],
         outers: List[List[OSMNode]],
-    ):
+    ) -> None:
         super().__init__()
 
         self.tags: Dict[str, str] = tags
@@ -72,7 +72,7 @@ class Building(Figure):
         outers: List[List[OSMNode]],
         flinger: Flinger,
         scheme: Scheme,
-    ):
+    ) -> None:
         super().__init__(tags, inners, outers)
 
         style: Dict[str, Any] = {
@@ -192,7 +192,7 @@ class StyledFigure(Figure):
         inners: List[List[OSMNode]],
         outers: List[List[OSMNode]],
         line_style: LineStyle,
-    ):
+    ) -> None:
         super().__init__(tags, inners, outers)
         self.line_style = line_style
 
@@ -208,7 +208,7 @@ class Road(Figure):
         inners: List[List[OSMNode]],
         outers: List[List[OSMNode]],
         matcher: RoadMatcher,
-    ):
+    ) -> None:
         super().__init__(tags, inners, outers)
         self.matcher: RoadMatcher = matcher
 
@@ -243,7 +243,7 @@ class Tree(Tagged):
 
     def __init__(
         self, tags: dict[str, str], coordinates: np.array, point: np.array
-    ):
+    ) -> None:
         super().__init__(tags)
         self.coordinates: np.array = coordinates
         self.point: np.array = point
@@ -269,7 +269,7 @@ class DirectionSector(Tagged):
     Sector that represents direction.
     """
 
-    def __init__(self, tags: dict[str, str], point):
+    def __init__(self, tags: dict[str, str], point) -> None:
         super().__init__(tags)
         self.point = point
 
@@ -337,7 +337,7 @@ class Segment:
     Line segment.
     """
 
-    def __init__(self, point_1: np.array, point_2: np.array):
+    def __init__(self, point_1: np.array, point_2: np.array) -> None:
         self.point_1: np.array = point_1
         self.point_2: np.array = point_2
 
diff --git a/roentgen/flinger.py b/roentgen/flinger.py
index e6f709f..208335b 100644
--- a/roentgen/flinger.py
+++ b/roentgen/flinger.py
@@ -48,7 +48,7 @@ class Flinger:
         geo_boundaries: MinMax,
         scale: float = 18,
         border: np.array = np.array((0, 0)),
-    ):
+    ) -> None:
         """
         :param geo_boundaries: minimum and maximum latitude and longitude
         :param scale: OSM zoom level
diff --git a/roentgen/icon.py b/roentgen/icon.py
index 6137927..d9dfaaf 100644
--- a/roentgen/icon.py
+++ b/roentgen/icon.py
@@ -172,7 +172,9 @@ class ShapeExtractor:
     Shape is a single path with "id" attribute that aligned to 16×16 grid.
     """
 
-    def __init__(self, svg_file_name: Path, configuration_file_name: Path):
+    def __init__(
+        self, svg_file_name: Path, configuration_file_name: Path
+    ) -> None:
         """
         :param svg_file_name: input SVG file name with icons.  File may contain
             any other irrelevant graphics.
diff --git a/roentgen/mapcss.py b/roentgen/mapcss.py
index 712b5a9..4bec356 100644
--- a/roentgen/mapcss.py
+++ b/roentgen/mapcss.py
@@ -77,7 +77,7 @@ class MapCSSWriter:
         add_icons: bool = True,
         add_ways: bool = True,
         add_icons_for_lifecycle: bool = True,
-    ):
+    ) -> None:
         self.add_icons: bool = add_icons
         self.add_ways: bool = add_ways
         self.add_icons_for_lifecycle: bool = add_icons_for_lifecycle
diff --git a/roentgen/mapper.py b/roentgen/mapper.py
index 5c6a995..dc78fc0 100644
--- a/roentgen/mapper.py
+++ b/roentgen/mapper.py
@@ -37,7 +37,7 @@ class Map:
         overlap: int = 12,
         mode: str = "normal",
         label_mode: str = "main",
-    ):
+    ) -> None:
         self.overlap: int = overlap
         self.mode: str = mode
         self.label_mode: str = label_mode
diff --git a/roentgen/moire_manager.py b/roentgen/moire_manager.py
index f38e5f3..9cbd0b4 100644
--- a/roentgen/moire_manager.py
+++ b/roentgen/moire_manager.py
@@ -28,7 +28,7 @@ class ArgumentParser(argparse.ArgumentParser):
     Argument parser that stores arguments and creates help in Moire markup.
     """
 
-    def __init__(self, *args, **kwargs):
+    def __init__(self, *args, **kwargs) -> None:
         self.arguments: list[dict[str, Any]] = []
         super(ArgumentParser, self).__init__(*args, **kwargs)
 
@@ -90,7 +90,7 @@ class TestConfiguration:
     GitHub Actions test configuration.
     """
 
-    def __init__(self, test_config: Path):
+    def __init__(self, test_config: Path) -> None:
         self.steps: dict[str, Any] = {}
 
         with test_config.open() as input_file:
@@ -177,7 +177,7 @@ class RoentgenHTML(RoentgenMoire, DefaultHTML):
     Simple HTML.
     """
 
-    def __init__(self):
+    def __init__(self) -> None:
         self.images: dict = {}
 
     def color(self, args: Arguments) -> str:
@@ -203,7 +203,7 @@ class RoentgenOSMWiki(RoentgenMoire, DefaultWiki):
     See https://wiki.openstreetmap.org/wiki/Main_Page
     """
 
-    def __init__(self):
+    def __init__(self) -> None:
         self.images: dict = {}
         self.extractor: ShapeExtractor = ShapeExtractor(
             workspace.ICONS_PATH, workspace.ICONS_CONFIG_PATH
diff --git a/roentgen/osm_reader.py b/roentgen/osm_reader.py
index 8d10904..34354a0 100644
--- a/roentgen/osm_reader.py
+++ b/roentgen/osm_reader.py
@@ -51,7 +51,7 @@ class Tagged:
     OpenStreetMap element (node, way or relation) with tags.
     """
 
-    def __init__(self, tags: dict[str, str] = None):
+    def __init__(self, tags: dict[str, str] = None) -> None:
         self.tags: dict[str, str]
         self.tags = {} if tags is None else tags
 
@@ -104,7 +104,7 @@ class OSMNode(Tagged):
     See https://wiki.openstreetmap.org/wiki/Node
     """
 
-    def __init__(self):
+    def __init__(self) -> None:
         super().__init__()
 
         self.id_: Optional[int] = None
@@ -162,7 +162,9 @@ class OSMWay(Tagged):
     See https://wiki.openstreetmap.org/wiki/Way
     """
 
-    def __init__(self, id_: int = 0, nodes: Optional[list[OSMNode]] = None):
+    def __init__(
+        self, id_: int = 0, nodes: Optional[list[OSMNode]] = None
+    ) -> None:
         super().__init__()
 
         self.id_: int = id_
@@ -243,7 +245,7 @@ class OSMRelation(Tagged):
     See https://wiki.openstreetmap.org/wiki/Relation
     """
 
-    def __init__(self, id_: int = 0):
+    def __init__(self, id_: int = 0) -> None:
         super().__init__()
 
         self.id_: int = id_
@@ -312,7 +314,7 @@ class OSMData:
     The whole OpenStreetMap information about nodes, ways, and relations.
     """
 
-    def __init__(self):
+    def __init__(self) -> None:
         self.nodes: dict[int, OSMNode] = {}
         self.ways: dict[int, OSMWay] = {}
         self.relations: dict[int, OSMRelation] = {}
@@ -356,7 +358,7 @@ class OverpassReader:
     See https://wiki.openstreetmap.org/wiki/Overpass_API
     """
 
-    def __init__(self):
+    def __init__(self) -> None:
         self.osm_data = OSMData()
 
     def parse_json_file(self, file_name: Path) -> OSMData:
@@ -400,7 +402,7 @@ class OSMReader:
         parse_ways: bool = True,
         parse_relations: bool = True,
         is_full: bool = False,
-    ):
+    ) -> None:
         """
         :param parse_nodes: whether nodes should be parsed
         :param parse_ways:  whether ways should be parsed
diff --git a/roentgen/point.py b/roentgen/point.py
index 7477fed..ab8402f 100644
--- a/roentgen/point.py
+++ b/roentgen/point.py
@@ -23,7 +23,7 @@ class Occupied:
     texts, shapes).
     """
 
-    def __init__(self, width: int, height: int, overlap: float):
+    def __init__(self, width: int, height: int, overlap: float) -> None:
         self.matrix = np.full((int(width), int(height)), False, dtype=bool)
         self.width: float = width
         self.height: float = height
@@ -64,7 +64,7 @@ class Point(Tagged):
         priority: float = 0,
         is_for_node: bool = True,
         draw_outline: bool = True,
-    ):
+    ) -> None:
         super().__init__()
 
         assert point is not None
diff --git a/roentgen/road.py b/roentgen/road.py
index 28de82f..973c39d 100644
--- a/roentgen/road.py
+++ b/roentgen/road.py
@@ -50,7 +50,7 @@ class RoadPart:
         point_2: np.array,
         lanes: list[Lane],
         scale: False,
-    ):
+    ) -> None:
         """
         :param point_1: start point of the road part
         :param point_2: end point of the road part
@@ -297,7 +297,7 @@ class Intersection:
     points of the road parts should be the same.
     """
 
-    def __init__(self, parts: list[RoadPart]):
+    def __init__(self, parts: list[RoadPart]) -> None:
         self.parts: list[RoadPart] = sorted(parts, key=lambda x: x.get_angle())
 
         for index in range(len(self.parts)):
diff --git a/roentgen/scheme.py b/roentgen/scheme.py
index b3c6ec0..73c060b 100644
--- a/roentgen/scheme.py
+++ b/roentgen/scheme.py
@@ -89,7 +89,7 @@ class Matcher:
     Tag matching.
     """
 
-    def __init__(self, structure: dict[str, Any]):
+    def __init__(self, structure: dict[str, Any]) -> None:
         self.tags: dict[str, str] = structure["tags"]
 
         self.exception: dict[str, str] = {}
@@ -159,7 +159,7 @@ class NodeMatcher(Matcher):
     Tag specification matcher.
     """
 
-    def __init__(self, structure: dict[str, Any]):
+    def __init__(self, structure: dict[str, Any]) -> None:
         # Dictionary with tag keys and values, value lists, or "*"
         super().__init__(structure)
 
@@ -203,7 +203,7 @@ class WayMatcher(Matcher):
     Special tag matcher for ways.
     """
 
-    def __init__(self, structure: dict[str, Any], scheme: "Scheme"):
+    def __init__(self, structure: dict[str, Any], scheme: "Scheme") -> None:
         super().__init__(structure)
         self.style: dict[str, Any] = {"fill": "none"}
         if "style" in structure:
@@ -227,7 +227,7 @@ class RoadMatcher(Matcher):
     Special tag matcher for highways.
     """
 
-    def __init__(self, structure: dict[str, Any], scheme: "Scheme"):
+    def __init__(self, structure: dict[str, Any], scheme: "Scheme") -> None:
         super().__init__(structure)
         self.border_color: Color = Color(
             scheme.get_color(structure["border_color"])
@@ -248,7 +248,7 @@ class Scheme:
     Specifies map colors and rules to draw icons for OpenStreetMap tags.
     """
 
-    def __init__(self, file_name: Path):
+    def __init__(self, file_name: Path) -> None:
         """
         :param file_name: name of the scheme file with tags, colors, and tag key
             specification
diff --git a/roentgen/server.py b/roentgen/server.py
index b2bde5f..81b33e3 100644
--- a/roentgen/server.py
+++ b/roentgen/server.py
@@ -21,7 +21,7 @@ class Handler(BaseHTTPRequestHandler):
 
     def __init__(
         self, request: bytes, client_address: tuple[str, int], server
-    ):
+    ) -> None:
         super().__init__(request, client_address, server)
         self.cache: Path = Path("cache")
         self.update_cache: bool = False
diff --git a/roentgen/taginfo.py b/roentgen/taginfo.py
index 7d36102..1370248 100644
--- a/roentgen/taginfo.py
+++ b/roentgen/taginfo.py
@@ -25,7 +25,7 @@ class TaginfoProjectFile:
     JSON structure with OpenStreetMap tag usage.
     """
 
-    def __init__(self, path: Path, scheme: Scheme):
+    def __init__(self, path: Path, scheme: Scheme) -> None:
         self.path: Path = path
 
         self.structure = {
diff --git a/roentgen/vector.py b/roentgen/vector.py
index 3236e3f..d7e5926 100644
--- a/roentgen/vector.py
+++ b/roentgen/vector.py
@@ -47,7 +47,7 @@ class Line:
     Infinity line: Ax + By + C = 0.
     """
 
-    def __init__(self, start: np.array, end: np.array):
+    def __init__(self, start: np.array, end: np.array) -> None:
         # if start.near(end):
         #     util.error("cannot create line by one point")
         self.a: float = start[1] - end[1]
diff --git a/roentgen/workspace.py b/roentgen/workspace.py
index 3eddece..f4c597e 100644
--- a/roentgen/workspace.py
+++ b/roentgen/workspace.py
@@ -32,7 +32,7 @@ class Workspace:
 
     MAPCSS_ICONS_DIRECTORY_NAME: str = "icons"
 
-    def __init__(self, output_path: Path):
+    def __init__(self, output_path: Path) -> None:
         self.output_path: Path = output_path
         check_and_create(output_path)