diff --git a/Fix-datetime-serialization.patch b/Fix-datetime-serialization.patch
new file mode 100644
index 0000000..90c5825
--- /dev/null
+++ b/Fix-datetime-serialization.patch
@@ -0,0 +1,48 @@
+From dffef385459c3bd49c33fd69b759485016a7f0b2 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Martin=20Vejn=C3=A1r?= <vejnar.martin@gmail.com>
+Date: Sat, 27 Oct 2018 21:47:28 +0200
+Subject: [PATCH] Fix datetime serialization
+
+---
+ pytoml/writer.py | 11 ++---------
+ 1 file changed, 2 insertions(+), 9 deletions(-)
+
+diff --git a/pytoml/writer.py b/pytoml/writer.py
+index 6eaf5d7..2d8afb5 100644
+--- a/pytoml/writer.py
++++ b/pytoml/writer.py
+@@ -48,13 +48,6 @@ def _escape_id(s):
+ def _format_list(v):
+     return '[{0}]'.format(', '.join(_format_value(obj) for obj in v))
+ 
+-# Formula from:
+-#   https://docs.python.org/2/library/datetime.html#datetime.timedelta.total_seconds
+-# Once support for py26 is dropped, this can be replaced by td.total_seconds()
+-def _total_seconds(td):
+-    return ((td.microseconds
+-             + (td.seconds + td.days * 24 * 3600) * 10**6) / 10.0**6)
+-
+ def _format_value(v):
+     if isinstance(v, bool):
+         return 'true' if v else 'false'
+@@ -69,7 +62,7 @@ def _format_value(v):
+         return _escape_string(v)
+     elif isinstance(v, datetime.datetime):
+         offs = v.utcoffset()
+-        offs = _total_seconds(offs) // 60 if offs is not None else 0
++        offs = int(offs.total_seconds()) // 60 if offs is not None else 0
+ 
+         if offs == 0:
+             suffix = 'Z'
+@@ -79,7 +72,7 @@ def _format_value(v):
+             else:
+                 suffix = '-'
+                 offs = -offs
+-            suffix = '{0}{1:.02}{2:.02}'.format(suffix, offs // 60, offs % 60)
++            suffix = '{0}{1:02}:{2:02}'.format(suffix, offs // 60, offs % 60)
+ 
+         if v.microsecond:
+             return v.strftime('%Y-%m-%dT%H:%M:%S.%f') + suffix
+-- 
+2.27.0
+
diff --git a/python-pytoml.spec b/python-pytoml.spec
index b61fb65..e8a8e47 100644
--- a/python-pytoml.spec
+++ b/python-pytoml.spec
@@ -2,12 +2,13 @@
 
 Name:           python-%{github_name}
 Version:        0.1.18
-Release:        4
+Release:        5
 Summary:        Parser for TOML
 License:        MIT
 URL:            https://github.com/avakar/%{github_name}
 Source0:        https://github.com/avakar/%{github_name}/archive/v%{version}/%{github_name}-%{version}.tar.gz
 Patch0:         Add-.vscode-and-.pytest_cache-to-.gitignore.patch
+Patch1:         Fix-datetime-serialization.patch
 BuildArch:      noarch
 
 %global my_description \
@@ -43,6 +44,9 @@ BuildRequires:  python3-setuptools
 %{python3_sitelib}/%{github_name}/
 
 %changelog
+* Fri Dec 29 2023 fandehui <fandehui@xfusion.com> - 0.1.18-5
+- Fix datetime serialization
+
 * Mon Dec 11 2023 fandehui <fandehui@xfusion.com> - 0.1.18-4
 - Add .vscode and .pytest_cache to .gitignore