diff --git a/.rubocop_todo.yml b/.rubocop_todo.yml
index 58909603..089c60c1 100644
--- a/.rubocop_todo.yml
+++ b/.rubocop_todo.yml
@@ -294,12 +294,13 @@ RSpec/StubbedMock:
   Exclude:
     - 'spec/models/user_spec.rb'
 
-# Offense count: 2
+# Offense count: 3
 # Configuration parameters: IgnoreNameless, IgnoreSymbolicNames.
 RSpec/VerifiedDoubles:
   Exclude:
     - 'spec/features/confirmation_spec.rb'
     - 'spec/models/user_spec.rb'
+    - 'spec/controllers/spree/admin/user_unlocks_controller_spec.rb'
 
 # Offense count: 12
 # This cop supports unsafe autocorrection (--autocorrect-all).
diff --git a/app/mailers/spree/user_mailer.rb b/app/mailers/spree/user_mailer.rb
index 2ee9f3b3..94c68c2c 100644
--- a/app/mailers/spree/user_mailer.rb
+++ b/app/mailers/spree/user_mailer.rb
@@ -13,5 +13,13 @@ def confirmation_instructions(user, token, _opts = {})
       @confirmation_url = spree.spree_user_confirmation_url(confirmation_token: token, host: @store.url)
       mail to: user.email, from: from_address(@store), subject: "#{@store.name} #{I18n.t(:subject, scope: [:devise, :mailer, :confirmation_instructions])}"
     end
+
+    def unlock_instructions(user, token, _opts = {})
+      @store = Spree::Store.default
+      @user = user
+
+      @unlock_url = spree.admin_unlock_url(unlock_token: token, host: @store.url)
+      mail to: user.email, from: from_address(@store), subject: "#{@store.name} #{I18n.t(:subject, scope: [:devise, :mailer, :unlock_instructions])}"
+    end
   end
 end
diff --git a/app/models/spree/user.rb b/app/models/spree/user.rb
index ab0fd927..031a468c 100644
--- a/app/models/spree/user.rb
+++ b/app/models/spree/user.rb
@@ -5,7 +5,8 @@ class User < Spree::Base
     include UserMethods
 
     devise :database_authenticatable, :registerable, :recoverable,
-           :rememberable, :trackable, :validatable, :encryptable
+           :rememberable, :trackable, :validatable, :encryptable,
+           :lockable
     devise :confirmable if Spree::Auth::Config[:confirmable]
 
     if defined?(Spree::SoftDeletable)
diff --git a/config/initializers/devise.rb b/config/initializers/devise.rb
index 5f724ef1..7de243ad 100644
--- a/config/initializers/devise.rb
+++ b/config/initializers/devise.rb
@@ -81,14 +81,14 @@
   # Defines which strategy will be used to lock an account.
   # :failed_attempts = Locks an account after a number of failed attempts to sign in.
   # :none            = No lock strategy. You should handle locking by yourself.
-  # config.lock_strategy = :failed_attempts
+  config.lock_strategy = :none
 
   # Defines which strategy will be used to unlock an account.
   # :email = Sends an unlock link to the user email
   # :time  = Re-enables login after a certain amount of time (see :unlock_in below)
   # :both  = Enables both strategies
   # :none  = No unlock strategy. You should handle unlocking by yourself.
-  # config.unlock_strategy = :both
+  config.unlock_strategy = :both
 
   # Number of authentication tries before locking an account if lock_strategy
   # is failed attempts.
diff --git a/config/routes.rb b/config/routes.rb
index 39613b7d..5d78e6c5 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -46,7 +46,8 @@
         path_names: { sign_out: 'logout' },
         controllers: {
           sessions: 'spree/admin/user_sessions',
-          passwords: 'spree/admin/user_passwords'
+          passwords: 'spree/admin/user_passwords',
+          unlocks: 'spree/admin/user_unlocks'
         },
         router_name: :spree
       })
@@ -61,6 +62,9 @@
         post '/password/recover', to: 'user_passwords#create', as: :reset_password
         get '/password/change', to: 'user_passwords#edit', as: :edit_password
         put '/password/change', to: 'user_passwords#update', as: :update_password
+
+        get '/unlock', to: 'user_unlocks#show', as: :unlock
+        post '/unlock', to: 'user_unlocks#create'
       end
     end
   end
diff --git a/lib/controllers/backend/spree/admin/user_unlocks_controller.rb b/lib/controllers/backend/spree/admin/user_unlocks_controller.rb
new file mode 100644
index 00000000..cf711478
--- /dev/null
+++ b/lib/controllers/backend/spree/admin/user_unlocks_controller.rb
@@ -0,0 +1,22 @@
+# frozen_string_literal: true
+
+module Spree
+  module Admin
+    class UserUnlocksController < Devise::UnlocksController
+      helper 'spree/base'
+
+      include Spree::Core::ControllerHelpers::Auth
+      include Spree::Core::ControllerHelpers::Common
+      include Spree::Core::ControllerHelpers::Store
+
+      helper 'spree/admin/navigation'
+      layout 'spree/layouts/admin'
+
+      private
+
+      def after_unlock_path_for(_resource)
+        admin_login_path if is_navigational_format?
+      end
+    end
+  end
+end
diff --git a/lib/views/backend/spree/user_mailer/unlock_instructions.html.erb b/lib/views/backend/spree/user_mailer/unlock_instructions.html.erb
new file mode 100644
index 00000000..1a40d6ea
--- /dev/null
+++ b/lib/views/backend/spree/user_mailer/unlock_instructions.html.erb
@@ -0,0 +1,7 @@
+<p>Hello <%= @user.email %>!</p>
+
+<p>Your account has been locked due to an excessive number of unsuccessful sign in attempts.</p>
+
+<p>Click the link below to unlock your account:</p>
+
+<p><%= link_to 'Unlock my account', @unlock_url %></p>
diff --git a/spec/controllers/spree/admin/user_unlocks_controller_spec.rb b/spec/controllers/spree/admin/user_unlocks_controller_spec.rb
new file mode 100644
index 00000000..d497e817
--- /dev/null
+++ b/spec/controllers/spree/admin/user_unlocks_controller_spec.rb
@@ -0,0 +1,39 @@
+# frozen_string_literal: true
+
+RSpec.describe Spree::Admin::UserUnlocksController, type: :controller do
+  # rubocop:disable RSpec/InstanceVariable
+  before { @request.env['devise.mapping'] = Devise.mappings[:spree_user] }
+
+  describe '#create' do
+    let(:user) { create(:user, locked_at: Time.current) }
+
+    it 'sends unlock instructions to the user' do
+      # rubocop:disable RSpec/StubbedMock
+      expect(Spree::UserMailer).to receive(:unlock_instructions).and_return(double(deliver: true))
+      # rubocop:enable RSpec/StubbedMock
+
+      post :create, params: { spree_user: { email: user.email } }
+
+      expect(assigns[:spree_user].email).to eq(user.email)
+      expect(response.code).to eq('302')
+    end
+  end
+
+  describe '#show' do
+    let(:user) { create(:user, locked_at: Time.current) }
+
+    before {
+      @raw_token, encrypted_token = Devise.token_generator.generate(user.class, :unlock_token)
+      user.update(unlock_token: encrypted_token)
+    }
+
+    it 'unlocks a previously locked user' do
+      get :show, params: { unlock_token: @raw_token }
+
+      expect(response.code).to eq '302'
+      expect(user.reload.locked_at).to be_nil
+    end
+  end
+
+  # rubocop:enable RSpec/InstanceVariable
+end