diff --git a/CHANGES.txt b/CHANGES.txt
index dab9cbe9..bcd0ae30 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -1,3 +1,6 @@
+8.4.1 (Apr 16, 2021)
+ - Bumped mmh3cffi dependency which now requires c99 flag to build.
+
 8.4.0 (Jan 6, 2021)
  - Added RecordStats for supporting pipelined recording in redis when treatment call is made.
  - Added hooks support for preforked servers.
diff --git a/setup.py b/setup.py
index a1372a5e..1aba87f1 100644
--- a/setup.py
+++ b/setup.py
@@ -41,7 +41,7 @@
         'test': TESTS_REQUIRES,
         'redis': ['redis>=2.10.5'],
         'uwsgi': ['uwsgi>=2.0.0'],
-        'cpphash': ['mmh3cffi==0.2.0'],
+        'cpphash': ['mmh3cffi==0.2.1'],
     },
     setup_requires=['pytest-runner'],
     classifiers=[
diff --git a/splitio/version.py b/splitio/version.py
index b0193b93..b8f97ce9 100644
--- a/splitio/version.py
+++ b/splitio/version.py
@@ -1 +1 @@
-__version__ = '8.4.0'
+__version__ = '8.4.1'