diff --git a/acme/setup.py b/acme/setup.py
index 6b7badbd6..d1e91e5ec 100644
--- a/acme/setup.py
+++ b/acme/setup.py
@@ -4,7 +4,7 @@ from setuptools import setup
 from setuptools import find_packages
 
 
-version = '0.11.0'
+version = '0.12.0.dev0'
 
 # Please update tox.ini when modifying dependency version requirements
 install_requires = [
diff --git a/certbot-apache/setup.py b/certbot-apache/setup.py
index 957b31c52..87ea1a281 100644
--- a/certbot-apache/setup.py
+++ b/certbot-apache/setup.py
@@ -4,7 +4,7 @@ from setuptools import setup
 from setuptools import find_packages
 
 
-version = '0.11.0'
+version = '0.12.0.dev0'
 
 # Please update tox.ini when modifying dependency version requirements
 install_requires = [
diff --git a/certbot-compatibility-test/setup.py b/certbot-compatibility-test/setup.py
index d7c7f2531..e2d226a72 100644
--- a/certbot-compatibility-test/setup.py
+++ b/certbot-compatibility-test/setup.py
@@ -4,7 +4,7 @@ from setuptools import setup
 from setuptools import find_packages
 
 
-version = '0.11.0'
+version = '0.12.0.dev0'
 
 install_requires = [
     'certbot',
diff --git a/certbot-nginx/setup.py b/certbot-nginx/setup.py
index 48c7080df..6de2dc6bd 100644
--- a/certbot-nginx/setup.py
+++ b/certbot-nginx/setup.py
@@ -4,7 +4,7 @@ from setuptools import setup
 from setuptools import find_packages
 
 
-version = '0.11.0'
+version = '0.12.0.dev0'
 
 # Please update tox.ini when modifying dependency version requirements
 install_requires = [
diff --git a/certbot/__init__.py b/certbot/__init__.py
index de4097a9b..6451eb0d5 100644
--- a/certbot/__init__.py
+++ b/certbot/__init__.py
@@ -1,4 +1,4 @@
 """Certbot client."""
 
 # version number like 1.2.3a0, must have at least 2 parts, like 1.2
-__version__ = '0.11.0'
+__version__ = '0.12.0.dev0'
diff --git a/letsencrypt-auto-source/letsencrypt-auto b/letsencrypt-auto-source/letsencrypt-auto
index 90b8157fe..bd519ff61 100755
--- a/letsencrypt-auto-source/letsencrypt-auto
+++ b/letsencrypt-auto-source/letsencrypt-auto
@@ -23,7 +23,7 @@ if [ -z "$VENV_PATH" ]; then
   VENV_PATH="$XDG_DATA_HOME/$VENV_NAME"
 fi
 VENV_BIN="$VENV_PATH/bin"
-LE_AUTO_VERSION="0.11.0"
+LE_AUTO_VERSION="0.12.0.dev0"
 BASENAME=$(basename $0)
 USAGE="Usage: $BASENAME [OPTIONS]
 A self-updating wrapper script for the Certbot ACME client. When run, updates