diff --git a/docs/Manpage.md b/docs/Manpage.md
index 1053e0f0627f4..5bebcd173fb99 100644
--- a/docs/Manpage.md
+++ b/docs/Manpage.md
@@ -1818,6 +1818,8 @@ process has finished successfully.
   Send a notification when the autoupdate process has finished successfully, if `terminal-notifier` is installed and found. Must be passed with `start`. Note: notifications are enabled by default on macOS Catalina and newer.
 * `--immediate`:
   Starts the autoupdate command immediately and on system boot, instead of waiting for one interval (24 hours by default) to pass first. Must be passed with `start`.
+* `--sudo`:
+  If a Cask requires sudo, autoupdate will open a GUI to ask for the password. Requires https://formulae.brew.sh/formula/pinentry-mac to be installed.
 
 ### `bundle` [*`subcommand`*]
 
diff --git a/manpages/brew.1 b/manpages/brew.1
index ea670d8ff772d..d65b69348093b 100644
--- a/manpages/brew.1
+++ b/manpages/brew.1
@@ -2579,6 +2579,10 @@ Send a notification when the autoupdate process has finished successfully, if \f
 \fB\-\-immediate\fR
 Starts the autoupdate command immediately and on system boot, instead of waiting for one interval (24 hours by default) to pass first\. Must be passed with \fBstart\fR\.
 .
+.TP
+\fB\-\-sudo\fR
+If a Cask requires sudo, autoupdate will open a GUI to ask for the password\. Requires https://formulae\.brew\.sh/formula/pinentry\-mac to be installed\.
+.
 .SS "\fBbundle\fR [\fIsubcommand\fR]"
 Bundler for non\-Ruby dependencies from Homebrew, Homebrew Cask, Mac App Store and Whalebrew\.
 .