diff --git a/script/upload b/script/upload
deleted file mode 100755
index f9bb20b097a2..000000000000
--- a/script/upload
+++ /dev/null
@@ -1,77 +0,0 @@
-#!/usr/bin/env python
-
-import errno
-import glob
-import os
-import subprocess
-import tempfile
-
-
-SOURCE_ROOT = os.path.abspath(os.path.dirname(os.path.dirname(__file__)))
-
-
-def main():
-    try:
-        ensure_s3put()
-        upload()
-    except AssertionError as e:
-        return e.message
-
-
-def ensure_s3put():
-    output = ''
-    try:
-        output = subprocess.check_output(['s3put', '--help'])
-    except OSError as e:
-        if e.errno != errno.ENOENT:
-            raise
-    assert 'multipart' in output, 'Error: Please install boto and filechunkio'
-
-
-def upload():
-    os.chdir(SOURCE_ROOT)
-    bucket, access_key, secret_key = s3_config()
-    commit = subprocess.check_output(['git', 'rev-parse', 'HEAD']).strip()
-
-    s3put(bucket, access_key, secret_key, 'atom-shell/{0}'.format(commit), glob.glob('atom-shell*.zip'))
-
-    update_version(bucket, access_key, secret_key, commit)
-
-
-def s3_config():
-    config = (os.environ.get('ATOM_SHELL_S3_BUCKET', ''),
-              os.environ.get('ATOM_SHELL_S3_ACCESS_KEY', ''),
-              os.environ.get('ATOM_SHELL_S3_SECRET_KEY', ''))
-    message = ('Error: Please set the $ATOM_SHELL_S3_BUCKET, '
-               '$ATOM_SHELL_S3_ACCESS_KEY, and '
-               '$ATOM_SHELL_S3_SECRET_KEY environment variables')
-    assert all(len(c) for c in config), message
-    return config
-
-
-def update_version(bucket, access_key, secret_key, commit):
-    version_path = os.path.join(SOURCE_ROOT, 'version')
-    with open(version_path, 'w') as version_file:
-      version_file.write(commit)
-
-    # Upload after file is closed, it's required under Windows.
-    s3put(bucket, access_key, secret_key, 'atom-shell', [ version_path ])
-
-
-def s3put(bucket, access_key, secret_key, key_prefix, files):
-    args = [
-        's3put',
-        '--bucket', bucket,
-        '--access_key', access_key,
-        '--secret_key', secret_key,
-        '--prefix', SOURCE_ROOT,
-        '--key_prefix', key_prefix,
-        '--grant', 'public-read'
-    ] + files
-
-    subprocess.check_call(args)
-
-
-if __name__ == '__main__':
-    import sys
-    sys.exit(main())
diff --git a/script/upload.py b/script/upload.py
new file mode 100755
index 000000000000..a73f8de454de
--- /dev/null
+++ b/script/upload.py
@@ -0,0 +1,77 @@
+#!/usr/bin/env python
+
+import errno
+import glob
+import os
+import subprocess
+import tempfile
+
+
+SOURCE_ROOT = os.path.abspath(os.path.dirname(os.path.dirname(__file__)))
+
+
+def main():
+  try:
+    ensure_s3put()
+    upload()
+  except AssertionError as e:
+    return e.message
+
+
+def ensure_s3put():
+  output = ''
+  try:
+    output = subprocess.check_output(['s3put', '--help'])
+  except OSError as e:
+    if e.errno != errno.ENOENT:
+      raise
+  assert 'multipart' in output, 'Error: Please install boto and filechunkio'
+
+
+def upload():
+  os.chdir(SOURCE_ROOT)
+  bucket, access_key, secret_key = s3_config()
+  commit = subprocess.check_output(['git', 'rev-parse', 'HEAD']).strip()
+
+  s3put(bucket, access_key, secret_key, 'atom-shell/{0}'.format(commit), glob.glob('atom-shell*.zip'))
+
+  update_version(bucket, access_key, secret_key, commit)
+
+
+def s3_config():
+  config = (os.environ.get('ATOM_SHELL_S3_BUCKET', ''),
+            os.environ.get('ATOM_SHELL_S3_ACCESS_KEY', ''),
+            os.environ.get('ATOM_SHELL_S3_SECRET_KEY', ''))
+  message = ('Error: Please set the $ATOM_SHELL_S3_BUCKET, '
+             '$ATOM_SHELL_S3_ACCESS_KEY, and '
+             '$ATOM_SHELL_S3_SECRET_KEY environment variables')
+  assert all(len(c) for c in config), message
+  return config
+
+
+def update_version(bucket, access_key, secret_key, commit):
+  version_path = os.path.join(SOURCE_ROOT, 'version')
+  with open(version_path, 'w') as version_file:
+    version_file.write(commit)
+
+  # Upload after file is closed, it's required under Windows.
+  s3put(bucket, access_key, secret_key, 'atom-shell', [ version_path ])
+
+
+def s3put(bucket, access_key, secret_key, key_prefix, files):
+  args = [
+    's3put',
+    '--bucket', bucket,
+    '--access_key', access_key,
+    '--secret_key', secret_key,
+    '--prefix', SOURCE_ROOT,
+    '--key_prefix', key_prefix,
+    '--grant', 'public-read'
+  ] + files
+
+  subprocess.check_call(args)
+
+
+if __name__ == '__main__':
+  import sys
+  sys.exit(main())