diff --git a/youtube_dl/extractor/vimeo.py b/youtube_dl/extractor/vimeo.py
index 2437ae1eb..b608740b8 100644
--- a/youtube_dl/extractor/vimeo.py
+++ b/youtube_dl/extractor/vimeo.py
@@ -13,6 +13,7 @@
     compat_urlparse,
 )
 from ..utils import (
+    encode_dict,
     ExtractorError,
     InAdvancePagedList,
     int_or_none,
@@ -40,13 +41,13 @@ def _login(self):
         self.report_login()
         webpage = self._download_webpage(self._LOGIN_URL, None, False)
         token, vuid = self._extract_xsrft_and_vuid(webpage)
-        data = urlencode_postdata({
+        data = urlencode_postdata(encode_dict({
             'action': 'login',
             'email': username,
             'password': password,
             'service': 'vimeo',
             'token': token,
-        })
+        }))
         login_request = compat_urllib_request.Request(self._LOGIN_URL, data)
         login_request.add_header('Content-Type', 'application/x-www-form-urlencoded')
         login_request.add_header('Cookie', 'vuid=%s' % vuid)
@@ -208,10 +209,10 @@ def _verify_video_password(self, url, video_id, webpage):
         if password is None:
             raise ExtractorError('This video is protected by a password, use the --video-password option', expected=True)
         token, vuid = self._extract_xsrft_and_vuid(webpage)
-        data = urlencode_postdata({
+        data = urlencode_postdata(encode_dict({
             'password': password,
             'token': token,
-        })
+        }))
         if url.startswith('http://'):
             # vimeo only supports https now, but the user can give an http url
             url = url.replace('http://', 'https://')
@@ -227,7 +228,7 @@ def _verify_player_video_password(self, url, video_id):
         password = self._downloader.params.get('videopassword', None)
         if password is None:
             raise ExtractorError('This video is protected by a password, use the --video-password option')
-        data = compat_urllib_parse.urlencode({'password': password})
+        data = urlencode_postdata(encode_dict({'password': password}))
         pass_url = url + '/check-password'
         password_request = compat_urllib_request.Request(pass_url, data)
         password_request.add_header('Content-Type', 'application/x-www-form-urlencoded')
@@ -488,7 +489,7 @@ def _login_list_password(self, page_url, list_id, webpage):
         token, vuid = self._extract_xsrft_and_vuid(webpage)
         fields['token'] = token
         fields['password'] = password
-        post = urlencode_postdata(fields)
+        post = urlencode_postdata(encode_dict(fields))
         password_path = self._search_regex(
             r'action="([^"]+)"', login_form, 'password URL')
         password_url = compat_urlparse.urljoin(page_url, password_path)