diff --git a/changelog.txt b/changelog.txt
index 6ffb766..b746b99 100644
--- a/changelog.txt
+++ b/changelog.txt
@@ -1,10 +1,12 @@
 since last version:
+-
+
+v2021.10.0
 - Added an 'invert' function to enable switching between minimization and maximization
 - Update branin_hf definition: correct constant from 2.25 to 22.5
 - Update six_hump_camelback_hf definition:
   * include omitted minus sign
   * rewrite to speed up calculation
--
 
 v2021.2.0:
 - enabled branch coverage and -Werror flag for tests
diff --git a/setup.py b/setup.py
index 1899e2b..04f514a 100644
--- a/setup.py
+++ b/setup.py
@@ -9,7 +9,7 @@
 
 setuptools.setup(
     name='mf2',
-    version='2021.2.0',
+    version='2021.10.0',
     description='A collection of analytical benchmark functions in multiple fidelities',
     long_description=long_description,
     long_description_content_type="text/markdown",