diff --git a/package-lock.json b/package-lock.json
index ab0e53f7..ff35b1dd 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "sphinx_rtd_theme",
-  "version": "0.5.2",
+  "version": "1.0.0alpha1",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
@@ -2809,7 +2809,7 @@
       }
     },
     "fresh": {
-      "version": "0.5.2",
+      "version": "1.0.0alpha1",
       "resolved": "https://registry.npmjs.org/fresh/-/fresh-0.5.2.tgz",
       "integrity": "sha1-PYyt2Q2XZWn6g1qx+OSyOhBWBac=",
       "dev": true
diff --git a/package.json b/package.json
index 1f2b85ce..d0da4941 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "sphinx_rtd_theme",
   "main": "js/theme.js",
-  "version": "0.5.2",
+  "version": "1.0.0alpha1",
   "scripts": {
     "dev": "webpack-dev-server --open --config webpack.dev.js",
     "build": "webpack --config webpack.prod.js",
diff --git a/setup.cfg b/setup.cfg
index 7c90d7d1..edd1c939 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,5 +1,5 @@
 [bumpversion]
-current_version = 0.5.2
+current_version = 1.0.0alpha1
 commit = false
 tag = false
 parse = (?P<major>\d+)\.(?P<minor>\d+)\.(?P<patch>\d+)((?P<release>[a-z]+)(?P<dev>\d+))?
diff --git a/setup.py b/setup.py
index 39f39374..65483ac6 100644
--- a/setup.py
+++ b/setup.py
@@ -87,7 +87,7 @@ class TransifexCommand(distutils.cmd.Command):
 
 setup(
     name='sphinx_rtd_theme',
-    version='0.5.2',
+    version='1.0.0alpha1',
     url='https://github.com/readthedocs/sphinx_rtd_theme',
     license='MIT',
     author='Dave Snider, Read the Docs, Inc. & contributors',
diff --git a/sphinx_rtd_theme/__init__.py b/sphinx_rtd_theme/__init__.py
index bd967a32..05d449e3 100644
--- a/sphinx_rtd_theme/__init__.py
+++ b/sphinx_rtd_theme/__init__.py
@@ -12,7 +12,7 @@ from sphinx.locale import _
 from sphinx.util.logging import getLogger
 
 
-__version__ = '0.5.2'
+__version__ = '1.0.0alpha1'
 __version_full__ = __version__
 
 logger = getLogger(__name__)