diff --git a/doc/source/changes.rst b/doc/source/changes.rst
index 0b8de13..b4340e4 100644
--- a/doc/source/changes.rst
+++ b/doc/source/changes.rst
@@ -2,6 +2,12 @@
 Changelog
 #########
 
+******
+4.0.12
+******
+
+- various improvements - please see the release on GitHub for details.
+
 ******
 4.0.11
 ******
diff --git a/gitdb/__init__.py b/gitdb/__init__.py
index 9b77e9f..1fb7df8 100644
--- a/gitdb/__init__.py
+++ b/gitdb/__init__.py
@@ -7,7 +7,7 @@
 __author__ = "Sebastian Thiel"
 __contact__ = "byronimo@gmail.com"
 __homepage__ = "https://github.com/gitpython-developers/gitdb"
-version_info = (4, 0, 11)
+version_info = (4, 0, 12)
 __version__ = '.'.join(str(i) for i in version_info)
 
 # default imports
diff --git a/gitdb/ext/smmap b/gitdb/ext/smmap
index 04dd210..f31bfa3 160000
--- a/gitdb/ext/smmap
+++ b/gitdb/ext/smmap
@@ -1 +1 @@
-Subproject commit 04dd2103ee6e0b7483889e5feda25053c6df2b52
+Subproject commit f31bfa378c8840d38d31e7e11ef2b84f191a491e
diff --git a/setup.py b/setup.py
index 51065c9..3a91543 100755
--- a/setup.py
+++ b/setup.py
@@ -7,7 +7,7 @@
 __author__ = "Sebastian Thiel"
 __contact__ = "byronimo@gmail.com"
 __homepage__ = "https://github.com/gitpython-developers/gitdb"
-version_info = (4, 0, 11)
+version_info = (4, 0, 12)
 __version__ = '.'.join(str(i) for i in version_info)
 
 setup(