diff --git a/docs/conf.py b/docs/conf.py
index 201d012..c8f9644 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -56,9 +56,9 @@
 # built documents.
 #
 # The short X.Y version.
-version = '2.0'
+version = '2.1'
 # The full version, including alpha/beta/rc tags.
-release = '2.0.0'
+release = '2.1.dev0'
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.
diff --git a/include/pybind11/common.h b/include/pybind11/common.h
index fb66f50..d0af572 100644
--- a/include/pybind11/common.h
+++ b/include/pybind11/common.h
@@ -53,8 +53,8 @@
 #endif
 
 #define PYBIND11_VERSION_MAJOR 2
-#define PYBIND11_VERSION_MINOR 0
-#define PYBIND11_VERSION_PATCH 0
+#define PYBIND11_VERSION_MINOR 1
+#define PYBIND11_VERSION_PATCH dev0
 
 /// Include Python header, disable linking to pythonX_d.lib on Windows in debug mode
 #if defined(_MSC_VER)
diff --git a/pybind11/_version.py b/pybind11/_version.py
index 074f417..6a75a2d 100644
--- a/pybind11/_version.py
+++ b/pybind11/_version.py
@@ -1,2 +1,2 @@
-version_info = (2, 0, 0)
+version_info = (2, 1, 'dev0')
 __version__ = '.'.join(map(str, version_info))