diff --git a/CHANGES.rst b/CHANGES.rst
index 15d188c..9c8ef3e 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -14,6 +14,11 @@
 Changes
 =======
 
+Version 1.0.0 (2017-12-07)
+
+- Fixes handling of unicode characters in DOIs.
+- Adds support for APS style arXiv identifiers.
+
 Version 0.2.4 (2017-01-30)
 
 - Removes `Python 3.3` from a list of supported Python versions and
diff --git a/RELEASE-NOTES.rst b/RELEASE-NOTES.rst
index cfa7f57..d667119 100644
--- a/RELEASE-NOTES.rst
+++ b/RELEASE-NOTES.rst
@@ -1,8 +1,8 @@
 ============================
- IDUtils v0.2.4 is released
+ IDUtils v1.0.0 is released
 ============================
 
-IDUtils v0.2.4 was released on 2017-01-30
+IDUtils v1.0.0 was released on 2017-12-07
 
 About
 -----
@@ -12,19 +12,18 @@ Small library for persistent identifiers used in scholarly communication.
 Improved features
 -----------------
 
-- Removes `Python 3.3` from a list of supported Python versions and
-  adds `Python 3.6`
-- Moves from `isbnid (v0.3.4)` to `isbnid_fork (v0.4.4)` library.
+- Fixes handling of unicode characters in DOIs.
+- Adds support for APS style arXiv identifiers.
 
 Installation
 ------------
 
-   $ pip install idutils==0.2.4
+   $ pip install idutils==1.0.0
 
 Documentation
 -------------
 
-   http://idutils.readthedocs.io/en/v0.2.4
+   http://idutils.readthedocs.io/en/v1.0.0
 
 Homepage
 --------
diff --git a/idutils/__init__.py b/idutils/__init__.py
index 916b8d9..fe5a317 100644
--- a/idutils/__init__.py
+++ b/idutils/__init__.py
@@ -18,7 +18,7 @@
 import re
 
 from isbn import ISBN
-from six.moves.urllib.parse import urlparse, quote_plus
+from six.moves.urllib.parse import urlparse
 
 
 from .version import __version__
diff --git a/idutils/version.py b/idutils/version.py
index 6153e50..edd306b 100644
--- a/idutils/version.py
+++ b/idutils/version.py
@@ -19,4 +19,4 @@
 
 from __future__ import absolute_import, print_function
 
-__version__ = "0.2.5.dev20170131"
+__version__ = "1.0.0"