diff --git a/README.md b/README.md
index c2a3fc8..1c45640 100644
--- a/README.md
+++ b/README.md
@@ -40,6 +40,11 @@ under `~/.pyenv/versions`.
 
 ## Version History
 
+#### 20130507
+
+ * Display virtualenv information in `--help` and `--version`
+ * Update virtualenv version; 1.8.4 -> 1.9.1
+
 #### 20130307
 
  * Rename the project; `s/python-virtualenv/pyenv-virtualenv/g`
diff --git a/bin/pyenv-virtualenv b/bin/pyenv-virtualenv
index 0da7a5d..7f82342 100755
--- a/bin/pyenv-virtualenv
+++ b/bin/pyenv-virtualenv
@@ -7,7 +7,7 @@
 #        pyenv virtualenv --help
 #
 
-PYENV_VIRTUALENV_VERSION="20130307"
+PYENV_VIRTUALENV_VERSION="20130507"
 
 set -e
 [ -n "$PYENV_DEBUG" ] && set -x
diff --git a/bin/python-virtualenv b/bin/python-virtualenv
index 3e54400..d77874b 100755
--- a/bin/python-virtualenv
+++ b/bin/python-virtualenv
@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 
-PYTHON_VIRTUALENV_VERSION="20130307"
+PYTHON_VIRTUALENV_VERSION="20130507"
 
 set -E
 exec 3<&2 # preserve original stderr at fd 3