diff --git a/CHANGELOG b/CHANGELOG
index 2909a76..a889843 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -2,7 +2,7 @@
 PY-SCA CHANGELOG
 ================
 
-<unreleased> Release Notes (date pending)
+v0.6.3 Release Notes (09/19/21)
 * Fixed conditions in loop causing conflicting conditions propagation (#7)
 + implemented identity (is, is not) comparison for const and instance (#7)
 * fixed Del and Delete shared the same node, and caused fields error (#7)
diff --git a/docs/source/conf.py b/docs/source/conf.py
index 3ca095f..edf1ce0 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -23,7 +23,7 @@
 author = "usagitoneko97"
 
 # The full version, including alpha/beta/rc tags
-release = "0.6.2"
+release = "0.6.3"
 
 
 # -- General configuration ---------------------------------------------------
diff --git a/klara/version.py b/klara/version.py
index 3d18726..63af887 100644
--- a/klara/version.py
+++ b/klara/version.py
@@ -1 +1 @@
-__version__ = "0.5.0"
+__version__ = "0.6.3"
diff --git a/pyproject.toml b/pyproject.toml
index ee3e6ff..0a9d99a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "klara"
-version = "0.6.2"
+version = "0.6.3"
 description = "Automatic test case generation and static analysis library"
 authors = ["Ho Guo Xian <hogouxian@gmail.com>"]
 documentation = "https://klara-py.readthedocs.io"