diff --git a/.bumpversion.cfg b/.bumpversion.cfg
index 942b05a..35121f5 100644
--- a/.bumpversion.cfg
+++ b/.bumpversion.cfg
@@ -1,5 +1,5 @@
 [bumpversion]
-current_version = 0.6.10
+current_version = 0.6.11
 commit = False
 tag = True
 
diff --git a/README.md b/README.md
index c8fa1c4..10dbd2c 100644
--- a/README.md
+++ b/README.md
@@ -92,4 +92,4 @@ $ conda uninstall riip
 - gitpython
 
 ## Version
-0.6.10
+0.6.11
diff --git a/conda_pkg/meta.yaml b/conda_pkg/meta.yaml
index 615d91f..3e01f3d 100644
--- a/conda_pkg/meta.yaml
+++ b/conda_pkg/meta.yaml
@@ -1,4 +1,4 @@
-{% set version = "0.6.10" %}
+{% set version = "0.6.11" %}
 
 package:
   name: riip
diff --git a/docs/conf.py b/docs/conf.py
index cf27512..3c925b7 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -1,7 +1,7 @@
 from recommonmark.transform import AutoStructify
 
 project = "RII_Pandas"
-version = "0.6.10"
+version = "0.6.11"
 copyright = "2021, Munehiro Nishida"
 author = "Munehiro Nishida"
 
diff --git a/setup.py b/setup.py
index 3d0653c..fa39a47 100644
--- a/setup.py
+++ b/setup.py
@@ -17,7 +17,7 @@
 
 setup(
     name="riip",
-    version="0.6.10",
+    version="0.6.11",
     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 3e6b8cb..6a18262 100644
--- a/src/riip/__init__.py
+++ b/src/riip/__init__.py
@@ -7,5 +7,5 @@
 # ]
 
 __author__ = "Munehiro Nishida"
-__version__ = "0.6.10"
+__version__ = "0.6.11"
 __license__ = "MIT"