diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 07d903c..88ff196 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -1,7 +1,7 @@
 Changelog
 =========
 
-0.10 - `master`_
+1.0 - `master`_
 ~~~~~~~~~~~~~~~~
 
 .. note:: This version is not yet released and is under active development.
diff --git a/docs/x509.rst b/docs/x509.rst
index 5e4d9bf..d355edc 100644
--- a/docs/x509.rst
+++ b/docs/x509.rst
@@ -724,7 +724,7 @@
 
 .. class:: OCSPNoCheck
 
-    .. versionadded:: 0.10
+    .. versionadded:: 1.0
 
     This presence of this extension indicates that an OCSP client can trust a
     responder for the lifetime of the responder's certificate. CAs issuing
diff --git a/src/cryptography/__about__.py b/src/cryptography/__about__.py
index 359cd81..9c28be2 100644
--- a/src/cryptography/__about__.py
+++ b/src/cryptography/__about__.py
@@ -14,7 +14,7 @@
                " and primitives to Python developers.")
 __uri__ = "https://github.com/pyca/cryptography"
 
-__version__ = "0.10.dev1"
+__version__ = "1.0.dev1"
 
 __author__ = "The cryptography developers"
 __email__ = "cryptography-dev@python.org"
diff --git a/vectors/cryptography_vectors/__about__.py b/vectors/cryptography_vectors/__about__.py
index f796fc3..a8199ce 100644
--- a/vectors/cryptography_vectors/__about__.py
+++ b/vectors/cryptography_vectors/__about__.py
@@ -14,7 +14,7 @@
 
 __uri__ = "https://github.com/pyca/cryptography"
 
-__version__ = "0.10.dev1"
+__version__ = "1.0.dev1"
 
 __author__ = "The cryptography developers"
 __email__ = "cryptography-dev@python.org"