diff --git a/README.md b/README.md
index 3d91e1c..f5aafcf 100644
--- a/README.md
+++ b/README.md
@@ -50,7 +50,7 @@ You can set certain environment variables to control the pyenv-virtualenv.
 
 ## Version History
 
-#### 2013XXYY
+#### 20130527
 
  * Remove `python-virtualenv` which was no longer used.
  * Change the installation path of the `virtualenv.py` script. (`./libexec` -> `./libexec/pyenv-virtualenv/${VIRTUALENV_VERSION}`)
diff --git a/bin/pyenv-virtualenv b/bin/pyenv-virtualenv
index 2d2cf92..b37f59d 100755
--- a/bin/pyenv-virtualenv
+++ b/bin/pyenv-virtualenv
@@ -7,7 +7,7 @@
 #        pyenv virtualenv --help
 #
 
-PYENV_VIRTUALENV_VERSION="20130507"
+PYENV_VIRTUALENV_VERSION="20130527"
 VIRTUALENV_VERSION="${VIRTUALENV_VERSION:-1.9.1}"
 
 set -e