diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6bceac0..e52b0cd 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,8 @@
+6.5.4
+-----
+
+- Bump required `mailsuite` version to `1.2.1`
+
 6.5.3
 -----
 
diff --git a/parsedmarc/__init__.py b/parsedmarc/__init__.py
index b51d352..3d9fe37 100644
--- a/parsedmarc/__init__.py
+++ b/parsedmarc/__init__.py
@@ -31,7 +31,7 @@ from parsedmarc.utils import is_outlook_msg, convert_outlook_msg
 from parsedmarc.utils import timestamp_to_human, human_timestamp_to_datetime
 from parsedmarc.utils import parse_email
 
-__version__ = "6.5.3"
+__version__ = "6.5.4"
 
 logging.basicConfig(
     format='%(levelname)8s:%(filename)s:%(lineno)d:'
diff --git a/setup.py b/setup.py
index 573528f..ad2b2c2 100644
--- a/setup.py
+++ b/setup.py
@@ -14,7 +14,7 @@ from setuptools import setup
 from codecs import open
 from os import path
 
-__version__ = "6.5.3"
+__version__ = "6.5.4"
 
 description = "A Python package and CLI for parsing aggregate and " \
               "forensic DMARC reports"
@@ -97,7 +97,7 @@ setup(
                       'urllib3<1.25,>=1.21.1', 'requests>=2.2.16.0',
                       'imapclient>=2.1.0', 'mail-parser>=3.9.2',
                       'dateparser>=0.7.1',
-                      'mailsuite>=1.1.1',
+                      'mailsuite>=1.2.1',
                       'elasticsearch>=6.3.1,<7.0.0',
                       'elasticsearch-dsl>=6.3.1,<7.0.0',
                       'kafka-python>=1.4.4',