diff --git a/doc/build.py b/doc/build.py
index 9721e298..c49094be 100755
--- a/doc/build.py
+++ b/doc/build.py
@@ -18,9 +18,8 @@ def pip_install(package, commit=None, **kwargs):
   print('Installing {}'.format(package))
   check_call(['pip', 'install', '--upgrade', package])
 
-def build_docs(version='dev'):
+def create_build_env():
   # Create virtualenv.
-  doc_dir = os.path.dirname(os.path.realpath(__file__))
   virtualenv_dir = 'virtualenv'
   check_call(['virtualenv', virtualenv_dir])
   import sysconfig
@@ -51,6 +50,8 @@ def build_docs(version='dev'):
               check_version='1.4a0.dev-20151013')
   pip_install('michaeljones/breathe',
               '1c9d7f80378a92cffa755084823a78bb38ee4acc')
+
+def build_docs(version='dev', doc_dir=os.path.dirname(os.path.realpath(__file__))):
   # Build docs.
   cmd = ['doxygen', '-']
   p = Popen(cmd, stdin=PIPE)
@@ -96,4 +97,5 @@ def build_docs(version='dev'):
   return 'html'
 
 if __name__ == '__main__':
+  create_build_env()
   build_docs(sys.argv[1])
diff --git a/support/travis-build.py b/support/travis-build.py
index 6dc09666..a43af2da 100755
--- a/support/travis-build.py
+++ b/support/travis-build.py
@@ -43,6 +43,7 @@ if build == 'Doc':
     check_call(['sudo', 'dpkg', '-i', deb_file])
   sys.path.insert(0, os.path.join(fmt_dir, 'doc'))
   import build
+  build.create_build_env()
   html_dir = build.build_docs()
   repo = 'fmtlib.github.io'
   if travis and 'KEY' not in os.environ:
diff --git a/support/update-website.py b/support/update-website.py
new file mode 100755
index 00000000..1ad24ed5
--- /dev/null
+++ b/support/update-website.py
@@ -0,0 +1,43 @@
+#!/usr/bin/env python
+
+import os, shutil, sys
+from subprocess import check_call
+
+class Git:
+  def __init__(self, dir):
+    self.dir = dir
+
+  def call(self, method, args, **kwargs):
+    return check_call(['git', method] + list(args), **kwargs)
+
+  def clone(self, *args):
+    return self.call('clone', list(args) + [self.dir])
+
+  def checkout(self, *args):
+    return self.call('checkout', args, cwd=self.dir)
+
+# Create build environment.
+fmt_dir = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
+sys.path.insert(0, os.path.join(fmt_dir, 'doc'))
+import build
+build.create_build_env()
+
+git = Git('fmt')
+git.clone('git@github.com:fmtlib/fmt.git')
+
+versions = ['1.0.0']
+for version in versions:
+  git.checkout(version)
+  target_doc_dir = os.path.join(git.dir, 'doc')
+  # Remove the old theme.
+  for entry in os.listdir(target_doc_dir):
+    path = os.path.join(target_doc_dir, entry)
+    if os.path.isdir(path):
+      shutil.rmtree(path)
+  # Copy the new theme.
+  for entry in ['_static', '_templates', 'basic-bootstrap', 'bootstrap']:
+    src = os.path.join(fmt_dir, 'doc', entry)
+    dst = os.path.join(target_doc_dir, entry)
+    shutil.copytree(src, dst)
+    build.build_docs(version, target_doc_dir)
+    # TODO: copy docs to website