diff --git a/HISTORY.rst b/HISTORY.rst
index 78184790..01ec2dd8 100644
--- a/HISTORY.rst
+++ b/HISTORY.rst
@@ -3,6 +3,18 @@
 Release History
 ---------------
 
+2.12.3 (2016-12-01)
++++++++++++++++++++
+
+**Bugfixes**
+
+- Fixed regression from v2.12.1 for URLs with schemes that begin with "http".
+  These URLs have historically been processed as though they were HTTP-schemed
+  URLs, and so have had parameters added. This was removed in v2.12.2 in an
+  overzealous attempt to resolve problems with IDNA-encoding those URLs. This
+  change was reverted: the other fixes for IDNA-encoding have been judged to
+  be sufficient to return to the behaviour Requests had before v2.12.0.
+
 2.12.2 (2016-11-30)
 +++++++++++++++++++
 
diff --git a/requests/__init__.py b/requests/__init__.py
index cf76ae04..c41c54f6 100644
--- a/requests/__init__.py
+++ b/requests/__init__.py
@@ -41,8 +41,8 @@ is at <http://python-requests.org>.
 """
 
 __title__ = 'requests'
-__version__ = '2.12.2'
-__build__ = 0x021202
+__version__ = '2.12.3'
+__build__ = 0x021203
 __author__ = 'Kenneth Reitz'
 __license__ = 'Apache 2.0'
 __copyright__ = 'Copyright 2016 Kenneth Reitz'