diff --git a/README.rst b/README.rst
index 54cc98d..2a69d2f 100644
--- a/README.rst
+++ b/README.rst
@@ -20,7 +20,7 @@ A **G**\ enetic **A**\ lgorithm **F**\ ramework in py\ **T**\ hon
     :target: https://www.python.org/downloads/release/python-351/
     :alt: platform
 
-.. image:: https://img.shields.io/badge/pypi-v0.5.3-blue.svg
+.. image:: https://img.shields.io/badge/pypi-v0.5.4-blue.svg
     :target: https://pypi.python.org/pypi/gaft/
     :alt: versions
 
diff --git a/gaft/__init__.py b/gaft/__init__.py
index 8cadd25..8c74bfc 100644
--- a/gaft/__init__.py
+++ b/gaft/__init__.py
@@ -3,7 +3,7 @@
 
 from .engine import GAEngine
 
-__version__ = '0.5.3'
+__version__ = '0.5.4'
 __author__ = 'ShaoZhengjiang <shaozhengjiang@gmail.com>'
 
 # Set root logger.
diff --git a/setup.py b/setup.py
index 93bb442..49de297 100644
--- a/setup.py
+++ b/setup.py
@@ -31,7 +31,7 @@
     :target: https://www.python.org/downloads/release/python-351/
     :alt: platform
 
-.. image:: https://img.shields.io/badge/pypi-v0.5.3-blue.svg
+.. image:: https://img.shields.io/badge/pypi-v0.5.4-blue.svg
     :target: https://pypi.python.org/pypi/gaft/
     :alt: versions