diff --git a/.bumpversion.cfg b/.bumpversion.cfg
index b817a07..78032c1 100644
--- a/.bumpversion.cfg
+++ b/.bumpversion.cfg
@@ -1,5 +1,5 @@
 [bumpversion]
-current_version = 0.6.7
+current_version = 0.6.8
 commit = False
 tag = True
 
diff --git a/README.md b/README.md
index 7f0fc0a..3ad0f49 100644
--- a/README.md
+++ b/README.md
@@ -92,4 +92,4 @@ $ conda uninstall riip
 - gitpython
 
 ## Version
-0.6.7
+0.6.8
diff --git a/conda_pkg/meta.yaml b/conda_pkg/meta.yaml
index 19f5832..2f8e366 100644
--- a/conda_pkg/meta.yaml
+++ b/conda_pkg/meta.yaml
@@ -1,4 +1,4 @@
-{% set version = "0.6.7" %}
+{% set version = "0.6.8" %}
 
 package:
   name: riip
diff --git a/docs/conf.py b/docs/conf.py
index 012167e..26cdde1 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -1,7 +1,7 @@
 from recommonmark.transform import AutoStructify
 
 project = "RII_Pandas"
-version = "0.6.7"
+version = "0.6.8"
 copyright = "2021, Munehiro Nishida"
 author = "Munehiro Nishida"
 
diff --git a/setup.py b/setup.py
index c9ee07c..d62e509 100644
--- a/setup.py
+++ b/setup.py
@@ -17,7 +17,7 @@
 
 setup(
     name="riip",
-    version="0.6.7",
+    version="0.6.8",
     url="https://github.com/mnishida/RII_Pandas",
     license="MIT",
     author="Munehiro Nishida",
diff --git a/src/riip/__init__.py b/src/riip/__init__.py
index 5591a97..165f419 100644
--- a/src/riip/__init__.py
+++ b/src/riip/__init__.py
@@ -7,5 +7,5 @@
 # ]
 
 __author__ = "Munehiro Nishida"
-__version__ = "0.6.7"
+__version__ = "0.6.8"
 __license__ = "MIT"