diff --git a/README.md b/README.md
index 6cbfecc..6040e40 100644
--- a/README.md
+++ b/README.md
@@ -16,6 +16,7 @@ API docs: https://cloud.yandex.com/en/docs/tracker/about-api
 ## Attention!
 * All `self` properties renamed to `url` cause it's incompatible with Python.
 * All `camelCase` properties renamed to `pythonic_case`.
+* All datetime values converted to python's `datetime.datetime` objects.
 * Methods named by author, cause Yandex API has no clear method names.
 
 
diff --git a/pyproject.toml b/pyproject.toml
index 7ab72d8..1d40fc9 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -37,7 +37,7 @@ classifiers = [
 dependencies = [
     "aiohttp~=3.8.5",
     "certifi>=2023",
-    "msgspec~=0.18.1",
+    "msgspec~=0.18.2",
 ]
 
 [project.optional-dependencies]
@@ -205,7 +205,7 @@ target-version = "py310"
 max-complexity = 10
 
 [tool.ruff.flake8-type-checking]
-runtime-evaluated-base-classes = ["msgspec.Struct"]
+runtime-evaluated-base-classes = ["msgspec.Struct", "yatracker.types.base.Base"]
 
 [tool.ruff.per-file-ignores]
 "tests/*" = ["S101", "INP001"]
diff --git a/yatracker/types/attachment.py b/yatracker/types/attachment.py
index 5b2bd02..212886b 100644
--- a/yatracker/types/attachment.py
+++ b/yatracker/types/attachment.py
@@ -2,6 +2,9 @@
 
 __all__ = ["Attachment"]
 
+
+from datetime import datetime
+
 from .base import Base, field
 from .user import User
 
@@ -15,7 +18,7 @@ class Attachment(Base, kw_only=True, frozen=True):
     content: str
     thumbnail: str | None = None
     created_by: User
-    created_at: str
+    created_at: datetime
     mimetype: str
     size: int
     metadata: Metadata | None = None
diff --git a/yatracker/types/comment.py b/yatracker/types/comment.py
index 59d587c..32411d5 100644
--- a/yatracker/types/comment.py
+++ b/yatracker/types/comment.py
@@ -2,6 +2,8 @@
 
 __all__ = ["Comment"]
 
+from datetime import datetime
+
 from .base import Base, field
 from .user import User
 
@@ -12,6 +14,6 @@ class Comment(Base, kw_only=True, frozen=True):
     text: str
     created_by: User
     updated_by: User | None = None
-    created_at: str
-    updated_at: str | None = None
+    created_at: datetime
+    updated_at: datetime | None = None
     version: int
diff --git a/yatracker/types/full_issue.py b/yatracker/types/full_issue.py
index c807c9a..8ec75d1 100644
--- a/yatracker/types/full_issue.py
+++ b/yatracker/types/full_issue.py
@@ -2,6 +2,9 @@
 
 __all__ = ["FullIssue"]
 
+
+from datetime import datetime
+
 from .base import Base, field
 from .comment import Comment
 from .issue import Issue
@@ -32,13 +35,13 @@ class FullIssue(Base, kw_only=True, frozen=True):
     favorite: bool
     assignee: User | None = None
 
-    last_comment_update_at: str | None = None
+    last_comment_update_at: datetime | None = None
     aliases: list[str] | None = None
     updated_by: User | None = None
-    created_at: str
+    created_at: datetime
     created_by: User
     votes: int
-    updated_at: str | None = None
+    updated_at: datetime | None = None
     status: Status
     previous_status: Status | None = None
     direction: str | None = None