diff --git a/pyproject.toml b/pyproject.toml
index c1900d3..c13dcf0 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -42,7 +42,6 @@ line-length = 120
 [tool.ruff.lint]
 select = ["ALL"]
 ignore = [
-  "ANN", # Annotations
   "D",   # Docstrings
   "FIX", # TODO, FIXME and other messages
   "ERA001", # Commented out code
diff --git a/src/signalblast/commands_strings.py b/src/signalblast/commands_strings.py
index fbc90d8..ff5fb00 100644
--- a/src/signalblast/commands_strings.py
+++ b/src/signalblast/commands_strings.py
@@ -1,5 +1,6 @@
 import inspect
 import re
+from collections.abc import Iterator
 from dataclasses import dataclass
 
 
@@ -7,13 +8,13 @@ class _IterableDataClass:
     _public_attr = None
 
     @classmethod
-    def _get_public_attributes(cls):
-        cls._public_attr = []
+    def _get_public_attributes(cls) -> None:
+        cls._public_attr: list[str] = []
         for attr, value in inspect.getmembers(cls):
             if not (attr.startswith("_") or inspect.ismethod(value)):
                 cls._public_attr.append(value)
 
-    def __iter__(self):
+    def __iter__(self) -> Iterator[str]:
         if self._public_attr is None:
             self._get_public_attributes()
 
diff --git a/src/signalblast/message_handler.py b/src/signalblast/message_handler.py
index d110821..6009395 100644
--- a/src/signalblast/message_handler.py
+++ b/src/signalblast/message_handler.py
@@ -22,7 +22,7 @@ def empty_list_to_none(self, attachments: list[str] | None) -> list | None:
 
         return attachments
 
-    def delete_attachments(self, attachments: list[str] | None, link_previews: list[str] | None):
+    def delete_attachments(self, attachments: list[str] | None, link_previews: list[str] | None) -> None:
         if attachments is not None:
             for attachment in attachments:
                 (self.attachments_folder / attachment).unlink()
@@ -34,12 +34,12 @@ def delete_attachments(self, attachments: list[str] | None, link_previews: list[
 
     @staticmethod
     def _compose_help_message(*, add_admin_commands: bool) -> str:
-        def _add_commands(message):
+        def _add_commands(message: str) -> str:
             for command_str in PublicCommandStrings:
                 message += "\t" + command_str + "\n"
             return message
 
-        def _add_admin_commands(message):
+        def _add_admin_commands(message: str) -> str:
             for command_str, command_arg in zip(AdminCommandStrings, AdminCommandArgs, strict=False):
                 message += "\t" + command_str + " " + command_arg + "\n"
             return message
diff --git a/src/signalblast/users.py b/src/signalblast/users.py
index 896e3c2..d53c306 100644
--- a/src/signalblast/users.py
+++ b/src/signalblast/users.py
@@ -4,6 +4,7 @@
 from typing import TYPE_CHECKING
 
 if TYPE_CHECKING:
+    from collections.abc import Iterator
     from pathlib import Path
 
 
@@ -23,7 +24,7 @@ async def remove(self, uuid: str) -> None:
         del self.data[uuid]
         await self.save_to_file()
 
-    async def save_to_file(self):
+    async def save_to_file(self) -> None:
         with self.save_path.open("w") as f:
             csv_writer = csv.DictWriter(f, fieldnames=[self._uuid_str, self._phone_number_str])
             csv_writer.writeheader()
@@ -42,13 +43,13 @@ async def _load_from_file(save_path: Path) -> Users:
     def get_phone_number(self, uuid: str) -> str | None:
         return self.data.get(uuid)
 
-    def __iter__(self):
+    def __iter__(self) -> Iterator[str | None]:
         yield from self.data
 
-    def __contains__(self, uuid: str):
+    def __contains__(self, uuid: str) -> bool:
         return uuid in self.data
 
-    def __len__(self):
+    def __len__(self) -> int:
         return len(self.data)
 
     @staticmethod
diff --git a/src/signalblast/utils.py b/src/signalblast/utils.py
index 2b3514c..9414cc0 100644
--- a/src/signalblast/utils.py
+++ b/src/signalblast/utils.py
@@ -39,7 +39,7 @@ def get_code_data_path() -> Path:
 def triggered(pattern: Pattern) -> Callable:
     def decorator_triggered(func: Callable) -> Callable:
         @functools.wraps(func)
-        async def wrapper_triggered(*args, **kwargs):
+        async def wrapper_triggered(*args, **kwargs) -> Callable:  # noqa: ANN002, ANN003
             c: ChatContext = args[1]
             text = c.message.text
             if not isinstance(text, str):