diff --git a/pyproject.toml b/pyproject.toml
index 39c537f..f001bf9 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -3,7 +3,7 @@ name = "streamer"
 version = "0.1.0"
 description = "Searching for tags in streams"
 readme = "README.md"
-requires-python = ">=3.12.11"
+requires-python = ">=3.12"
 dependencies = [
     "click>=8.2.1",
     "mistletoe>=1.4.0",
diff --git a/src/streamer/__init__.py b/src/streamer/__init__.py
index 0d2a52e..c39eede 100644
--- a/src/streamer/__init__.py
+++ b/src/streamer/__init__.py
@@ -50,7 +50,7 @@ def new() -> None:
 
     content = "# "
     with open(prelimary_path, "w") as file:
-        file.write(content)
+        _ = file.write(content)
 
     click.edit(None, filename=prelimary_path)
 
@@ -59,11 +59,11 @@ def new() -> None:
     parsed_content = parse_markdown_file(prelimary_path, content)
 
     final_file_name = f"{timestamp}.md"
-    if len(markers := parsed_content.shard.markers):
+    if parsed_content.shard is not None and len(markers := parsed_content.shard.markers):
         final_file_name = f"{timestamp} {' '.join(markers)}.md"
 
     final_path = os.path.join(streamer_directory, final_file_name)
-    move(prelimary_path, final_path)
+    _ = move(prelimary_path, final_path)
     print(f"Saved as [yellow]{final_file_name}")
 
 
diff --git a/src/streamer/localize/__init__.py b/src/streamer/localize/__init__.py
index 3b3380e..31f4f71 100644
--- a/src/streamer/localize/__init__.py
+++ b/src/streamer/localize/__init__.py
@@ -3,8 +3,6 @@ from .repostory_configuration import RepositoryConfiguration
 from .localized_shard import LocalizedShard
 
 __all__ = [
-    "Dimension",
-    "Marker",
     "RepositoryConfiguration",
     "localize_stream_file",
     "LocalizedShard",
diff --git a/src/streamer/localize/extract_datetime.py b/src/streamer/localize/extract_datetime.py
index 28012d7..ed82955 100644
--- a/src/streamer/localize/extract_datetime.py
+++ b/src/streamer/localize/extract_datetime.py
@@ -1,10 +1,9 @@
 from datetime import datetime
 import re
 import os
-from typing import Optional
 
 
-def extract_date_from_file_name(file_name: str) -> Optional[datetime]:
+def extract_date_from_file_name(file_name: str) -> datetime | None:
     FILE_NAME_REGEX = r"^(?P<date>\d{8})(?:-(?P<time>\d{4,6}))?.+.md$"
     base_name = os.path.basename(file_name)
     match = re.match(FILE_NAME_REGEX, base_name)
diff --git a/src/streamer/localize/localize.py b/src/streamer/localize/localize.py
index a27cc7a..9f181a5 100644
--- a/src/streamer/localize/localize.py
+++ b/src/streamer/localize/localize.py
@@ -1,4 +1,4 @@
-from typing import Optional
+
 from streamer.parse.shard import Shard, StreamFile
 
 from .repostory_configuration import RepositoryConfiguration
@@ -10,7 +10,7 @@ def localize_shard(
     shard: Shard, config: RepositoryConfiguration, propagated: dict[str, str]
 ) -> LocalizedShard:
     position = {**propagated}
-    private_position = {}
+    private_position: dict[str, str] = {}
 
     for marker in shard.markers:
         normalized_marker = marker.lower()
@@ -25,7 +25,7 @@ def localize_shard(
 
     children = [localize_shard(child, config, position) for child in shard.children]
 
-    (position.update(private_position),)
+    position.update(private_position)
 
     return LocalizedShard(
         **shard.model_dump(exclude={"children"}), location=position, children=children
@@ -34,9 +34,12 @@ def localize_shard(
 
 def localize_stream_file(
     stream_file: StreamFile, config: RepositoryConfiguration
-) -> Optional[LocalizedShard]:
+) -> LocalizedShard | None:
     shard_date = extract_date_from_file_name(stream_file.filename)
 
+    if not shard_date or not stream_file.shard:
+        raise ValueError("Could not extract date")
+
     return localize_shard(stream_file.shard, config, {"moment": shard_date.isoformat()})
 
 
diff --git a/src/streamer/localize/localized_shard.py b/src/streamer/localize/localized_shard.py
index 3276dbf..02d7ab8 100644
--- a/src/streamer/localize/localized_shard.py
+++ b/src/streamer/localize/localized_shard.py
@@ -4,7 +4,7 @@ from streamer.parse.shard import Shard
 
 class LocalizedShard(Shard):
     location: dict[str, str]
-    children: list[LocalizedShard]
+    children: list[LocalizedShard] = []  # pyright: ignore[reportIncompatibleVariableOverride]
 
 
 __all__ = ["LocalizedShard"]
diff --git a/src/streamer/parse/shard.py b/src/streamer/parse/shard.py
index 92c3244..397950f 100644
--- a/src/streamer/parse/shard.py
+++ b/src/streamer/parse/shard.py
@@ -12,7 +12,7 @@ class Shard(BaseModel):
 
 class StreamFile(BaseModel):
     filename: str
-    shard: Shard = None
+    shard: Shard | None = None
 
 
 __all__ = ["Shard", "StreamFile"]
diff --git a/test/localize/test_extract_datetime.py b/test/localize/test_extract_datetime.py
index da629f1..95cefc0 100644
--- a/test/localize/test_extract_datetime.py
+++ b/test/localize/test_extract_datetime.py
@@ -1,5 +1,5 @@
 from datetime import datetime
-from src.streamer.localize.extract_datetime import extract_date_from_file_name
+from streamer.localize.extract_datetime import extract_date_from_file_name
 
 
 class TestExtractDateTime: