diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2fe576532..a25d88951 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,8 @@ and adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## Unreleased
 
+## [2.6.3] - 2023-10-09
+
 ### Bug fixes
 
 - Ensure pycodestyle W503, line break before binary operator, is disabled (regression from 2.6.2).
diff --git a/python_ta/__init__.py b/python_ta/__init__.py
index 31377b7ca..9362d65d9 100644
--- a/python_ta/__init__.py
+++ b/python_ta/__init__.py
@@ -14,7 +14,7 @@
     import python_ta
     python_ta.check_all()
 """
-__version__ = "2.6.3.dev"  # Version number
+__version__ = "2.6.4.dev"  # Version number
 
 # First, remove underscore from builtins if it has been bound in the REPL.
 import builtins