diff --git a/docs/topics/settings.rst b/docs/topics/settings.rst
index 18f81838f..f06d9db3c 100644
--- a/docs/topics/settings.rst
+++ b/docs/topics/settings.rst
@@ -420,10 +420,9 @@ connections (for ``HTTP10DownloadHandler``).
 .. note::
 
     HTTP/1.0 is rarely used nowadays so you can safely ignore this setting,
-    unless you use Twisted<11.1, or if you really want to use HTTP/1.0
-    and override :setting:`DOWNLOAD_HANDLERS_BASE` for ``http(s)`` scheme
-    accordingly, i.e. to
-    ``'scrapy.core.downloader.handlers.http.HTTP10DownloadHandler'``.
+    unless you really want to use HTTP/1.0 and override
+    :setting:`DOWNLOAD_HANDLERS` for ``http(s)`` scheme accordingly,
+    i.e. to ``'scrapy.core.downloader.handlers.http.HTTP10DownloadHandler'``.
 
 .. setting:: DOWNLOADER_CLIENTCONTEXTFACTORY
 
@@ -447,7 +446,6 @@ or even enable client-side authentication (and various other things).
     Scrapy also has another context factory class that you can set,
     ``'scrapy.core.downloader.contextfactory.BrowserLikeContextFactory'``,
     which uses the platform's certificates to validate remote endpoints.
-    **This is only available if you use Twisted>=14.0.**
 
 If you do use a custom ContextFactory, make sure its ``__init__`` method
 accepts a ``method`` parameter (this is the ``OpenSSL.SSL`` method mapping
@@ -494,10 +492,6 @@ This setting must be one of these string values:
 - ``'TLSv1.2'``: forces TLS version 1.2
 - ``'SSLv3'``: forces SSL version 3 (**not recommended**)
 
-.. note::
-
-    We recommend that you use PyOpenSSL>=0.13 and Twisted>=0.13
-    or above (Twisted>=14.0 if you can).
 
 .. setting:: DOWNLOADER_CLIENT_TLS_VERBOSE_LOGGING
 
@@ -660,8 +654,6 @@ If you want to disable it set to 0.
     spider attribute and per-request using :reqmeta:`download_maxsize`
     Request.meta key.
 
-    This feature needs Twisted >= 11.1.
-
 .. setting:: DOWNLOAD_WARNSIZE
 
 DOWNLOAD_WARNSIZE
@@ -679,8 +671,6 @@ If you want to disable it set to 0.
     spider attribute and per-request using :reqmeta:`download_warnsize`
     Request.meta key.
 
-    This feature needs Twisted >= 11.1.
-
 .. setting:: DOWNLOAD_FAIL_ON_DATALOSS
 
 DOWNLOAD_FAIL_ON_DATALOSS