diff --git a/CHANGELOG.md b/CHANGELOG.md
index dd0ccc5f7..8814d5a4c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,49 @@ Changelog
 
 All notable changes to this project will be documented in this file.
 
+## [3.5.1] - 2022-04-08
+### Added
+
+- Add pagination for trending statuses in web UI ([Gargron](https://github.com/mastodon/mastodon/pull/17976))
+
+### Changed
+
+- Change e-mail notifications to only be sent when recipient is offline ([Gargron](https://github.com/mastodon/mastodon/pull/17984))
+  - Send e-mails for mentions and follows by default again
+  - But only when recipient does not have push notifications through an app
+- Change `website` attribute to be nullable on `Application` entity in REST API ([rinsuki](https://github.com/mastodon/mastodon/pull/17962))
+
+### Removed
+
+- Remove sign-in token authentication, instead send e-mail about new sign-in ([Gargron](https://github.com/mastodon/mastodon/pull/17970))
+  - You no longer need to enter a security code sent through e-mail
+  - Instead you get an e-mail about a new sign-in from an unfamiliar IP address
+
+### Fixed
+
+- Fix error resposes for `from` search prefix ([single-right-quote](https://github.com/mastodon/mastodon/pull/17963))
+- Fix dangling language-specific trends ([Gargron](https://github.com/mastodon/mastodon/pull/17997))
+- Fix extremely rare race condition when deleting a status or account ([ClearlyClaire](https://github.com/mastodon/mastodon/pull/17994))
+- Fix trends returning less results per page when filtered in REST API ([Gargron](https://github.com/mastodon/mastodon/pull/17996))
+- Fix pagination header on empty trends responses in REST API ([Gargron](https://github.com/mastodon/mastodon/pull/17986))
+- Fix cookies secure flag being set when served over Tor ([Gargron](https://github.com/mastodon/mastodon/pull/17992))
+- Fix migration error handling ([ClearlyClaire](https://github.com/mastodon/mastodon/pull/17991))
+- Fix error when re-running some migrations if they get interrupted at the wrong moment ([ClearlyClaire](https://github.com/mastodon/mastodon/pull/17989))
+- Fix potentially missing statuses when reconnecting to streaming API in web UI ([ClearlyClaire](https://github.com/mastodon/mastodon/pull/17981), [ClearlyClaire](https://github.com/mastodon/mastodon/pull/17987), [ClearlyClaire](https://github.com/mastodon/mastodon/pull/17980))
+- Fix error when sending warning emails with custom text ([ClearlyClaire](https://github.com/mastodon/mastodon/pull/17983))
+- Fix unset `SMTP_RETURN_PATH` environment variable causing e-mail not to send ([Gargron](https://github.com/mastodon/mastodon/pull/17982))
+- Fix possible duplicate statuses in timelines in some edge cases in web UI ([ClearlyClaire](https://github.com/mastodon/mastodon/pull/17971))
+- Fix spurious edits and require incoming edits to be explicitly marked as such ([ClearlyClaire](https://github.com/mastodon/mastodon/pull/17918))
+- Fix error when encountering invalid pinned statuses ([ClearlyClaire](https://github.com/mastodon/mastodon/pull/17964))
+- Fix inconsistency in error handling when removing a status ([ClearlyClaire](https://github.com/mastodon/mastodon/pull/17974))
+- Fix admin API unconditionally requiring CSRF token ([ClearlyClaire](https://github.com/mastodon/mastodon/pull/17975))
+- Fix trending tags endpoint missing `offset` param in REST API ([Gargron](https://github.com/mastodon/mastodon/pull/17973))
+- Fix unusual number formatting in some locales ([ClearlyClaire](https://github.com/mastodon/mastodon/pull/17929))
+- Fix `S3_FORCE_SINGLE_REQUEST` environment variable not working ([HolgerHuo](https://github.com/mastodon/mastodon/pull/17922))
+- Fix failure to build assets with OpenSSL 3 ([ClearlyClaire](https://github.com/mastodon/mastodon/pull/17930))
+- Fix PWA manifest using outdated routes ([HolgerHuo](https://github.com/mastodon/mastodon/pull/17921))
+- Fix error when indexing statuses into Elasticsearch ([ClearlyClaire](https://github.com/mastodon/mastodon/pull/17912))
+
 ## [3.5.0] - 2022-03-30
 ### Added
 
diff --git a/SECURITY.md b/SECURITY.md
index 5531a306e..12f50ed88 100644
--- a/SECURITY.md
+++ b/SECURITY.md
@@ -12,6 +12,7 @@ A "vulnerability in Mastodon" is a vulnerability in the code distributed through
 
 | Version | Supported          |
 | ------- | ------------------ |
+| 3.5.x   | Yes                |
 | 3.4.x   | Yes                |
 | 3.3.x   | Yes                |
 | < 3.3   | No                 |
diff --git a/app/controllers/api/v2/search_controller.rb b/app/controllers/api/v2/search_controller.rb
index ddcf92200..77eeab5b0 100644
--- a/app/controllers/api/v2/search_controller.rb
+++ b/app/controllers/api/v2/search_controller.rb
@@ -11,6 +11,10 @@ class Api::V2::SearchController < Api::BaseController
   def index
     @search = Search.new(search_results)
     render json: @search, serializer: REST::SearchSerializer
+  rescue Mastodon::SyntaxError
+    unprocessable_entity
+  rescue ActiveRecord::RecordNotFound
+    not_found
   end
 
   private
diff --git a/app/lib/search_query_transformer.rb b/app/lib/search_query_transformer.rb
index c685d7b6f..aef05e9d9 100644
--- a/app/lib/search_query_transformer.rb
+++ b/app/lib/search_query_transformer.rb
@@ -88,14 +88,14 @@ class SearchQueryTransformer < Parslet::Transform
       case prefix
       when 'from'
         @filter = :account_id
-        username, domain = term.split('@')
-        account = Account.find_remote(username, domain)
 
-        raise "Account not found: #{term}" unless account
+        username, domain = term.gsub(/\A@/, '').split('@')
+        domain           = nil if TagManager.instance.local_domain?(domain)
+        account          = Account.find_remote!(username, domain)
 
         @term = account.id
       else
-        raise "Unknown prefix: #{prefix}"
+        raise Mastodon::SyntaxError
       end
     end
   end
diff --git a/lib/exceptions.rb b/lib/exceptions.rb
index eb472abaa..0c677b660 100644
--- a/lib/exceptions.rb
+++ b/lib/exceptions.rb
@@ -10,6 +10,7 @@ module Mastodon
   class StreamValidationError < ValidationError; end
   class RaceConditionError < Error; end
   class RateLimitExceededError < Error; end
+  class SyntaxError < Error; end
 
   class UnexpectedResponseError < Error
     attr_reader :response
diff --git a/lib/mastodon/version.rb b/lib/mastodon/version.rb
index cb29e4a54..d6270df03 100644
--- a/lib/mastodon/version.rb
+++ b/lib/mastodon/version.rb
@@ -13,7 +13,7 @@ module Mastodon
     end
 
     def patch
-      0
+      1
     end
 
     def flags