diff --git a/Gemfile b/Gemfile
index c0143dedd6..c5f8446646 100644
--- a/Gemfile
+++ b/Gemfile
@@ -33,7 +33,7 @@ gem "omniauth_openid_connect"
 gem "omniauth-rails_csrf_protection"
 
 # ActionMailer support for GOV.UK Notify
-gem "mail-notify"
+gem "mail-notify", github: "asmega/mail-notify", branch: "one-click-unsubscribe"
 
 # Database based asynchronous priority queue system
 gem "delayed_job_active_record"
diff --git a/Gemfile.lock b/Gemfile.lock
index 8a008c0606..e0c402d8e1 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -9,6 +9,19 @@ GIT
       multi_xml (~> 0.6.0)
       request_store_rails (~> 2)
 
+GIT
+  remote: https://github.com/asmega/mail-notify.git
+  revision: bc8c25aa43ebc8d664f3c1760bf05ae9bd96796a
+  branch: one-click-unsubscribe
+  specs:
+    mail-notify (2.0.0)
+      actionmailer (>= 5.2.8.1)
+      actionpack (>= 5.2.8.1)
+      actionview (>= 5.2.8.1)
+      activesupport (>= 5.2.8.1)
+      notifications-ruby-client (~> 6.0)
+      rack (>= 2.1.4.1)
+
 GIT
   remote: https://github.com/microsoft/ApplicationInsights-Ruby.git
   revision: 5db6b4ad65262d23f26b678143a4a1fd7939e5c2
@@ -321,13 +334,6 @@ GEM
       net-imap
       net-pop
       net-smtp
-    mail-notify (2.0.0)
-      actionmailer (>= 5.2.8.1)
-      actionpack (>= 5.2.8.1)
-      actionview (>= 5.2.8.1)
-      activesupport (>= 5.2.8.1)
-      notifications-ruby-client (~> 6.0)
-      rack (>= 2.1.4.1)
     marcel (1.0.4)
     matrix (0.4.2)
     method_source (1.1.0)
@@ -359,7 +365,7 @@ GEM
       racc (~> 1.4)
     nokogiri (1.16.7-x86_64-linux)
       racc (~> 1.4)
-    notifications-ruby-client (6.1.0)
+    notifications-ruby-client (6.2.0)
       jwt (>= 1.5, < 3)
     omniauth (2.1.2)
       hashie (>= 3.4.6)
@@ -875,7 +881,7 @@ DEPENDENCIES
   jwt
   launchy
   listen (>= 3.0.5, < 3.10)
-  mail-notify
+  mail-notify!
   nanoid
   omniauth
   omniauth-rails_csrf_protection
diff --git a/app/mailers/reminder_mailer.rb b/app/mailers/reminder_mailer.rb
index 54313f5cc6..280edba745 100644
--- a/app/mailers/reminder_mailer.rb
+++ b/app/mailers/reminder_mailer.rb
@@ -44,7 +44,8 @@ def reminder_set(reminder)
       to: @reminder.email_address,
       reply_to_id: GENERIC_NOTIFY_REPLY_TO_ID,
       subject: @subject,
-      personalisation:
+      personalisation:,
+      one_click_unsubscribe_url: one_click_unsubscribe_url(reminder:)
     )
   end
 
@@ -75,6 +76,10 @@ def unsubscribe_url(reminder:)
     "https://#{ENV["CANONICAL_HOSTNAME"]}/#{reminder.journey::ROUTING_NAME}/unsubscribe/reminders/#{reminder.id}"
   end
 
+  def one_click_unsubscribe_url(reminder:)
+    "https://#{ENV["CANONICAL_HOSTNAME"]}/#{reminder.journey::ROUTING_NAME}/unsubscribe/reminders?id=#{reminder.id}"
+  end
+
   def extract_first_name(fullname)
     (fullname || "").split(" ").first
   end