diff --git a/lib/sidekiq/grouping.rb b/lib/sidekiq/grouping.rb
index 3e6b908..d827de8 100644
--- a/lib/sidekiq/grouping.rb
+++ b/lib/sidekiq/grouping.rb
@@ -2,7 +2,7 @@
 
 require "active_support"
 require "active_support/core_ext/string"
-require "active_support/configurable"
+require "active_support/ordered_options"
 require "active_support/core_ext/numeric/time"
 require "sidekiq"
 require "sidekiq/grouping/version"
@@ -55,6 +55,8 @@ def start!
   config.client_middleware do |chain|
     chain.add Sidekiq::Grouping::Middleware
   end
-end
 
-Sidekiq::Grouping.start! if Sidekiq.server?
+  config.on(:startup) do
+    Sidekiq::Grouping.start!
+  end
+end
diff --git a/lib/sidekiq/grouping/config.rb b/lib/sidekiq/grouping/config.rb
index 6bde5b6..b5db40f 100644
--- a/lib/sidekiq/grouping/config.rb
+++ b/lib/sidekiq/grouping/config.rb
@@ -3,38 +3,43 @@
 module Sidekiq
   module Grouping
     module Config
-      include ActiveSupport::Configurable
-
-      def self.options
-        if Sidekiq.respond_to?(:[]) # Sidekiq 6.x
-          Sidekiq[:grouping] || {}
-        elsif Sidekiq.respond_to?(:options) # Sidekiq <= 5.x
-          Sidekiq.options[:grouping] || Sidekiq.options["grouping"] || {}
-        else # Sidekiq 7.x
-          Sidekiq.default_configuration[:grouping] || {}
+      class << self
+        %i[lock_ttl max_batch_size poll_interval tests_env].each do |method_name|
+          define_method(method_name) do
+            config[method_name]
+          end
+          define_method(:"#{method_name}=") do |value|
+            config[method_name] = value
+          end
         end
-      end
-
-      # Queue size overflow check polling interval
-      config_accessor :poll_interval do
-        options[:poll_interval] || 3
-      end
 
-      # Maximum batch size
-      config_accessor :max_batch_size do
-        options[:max_batch_size] || 1000
-      end
+        private
 
-      # Batch queue flush lock timeout
-      config_accessor :lock_ttl do
-        options[:lock_ttl] || 1
-      end
+        def config
+          @config ||= ActiveSupport::InheritableOptions.new(
+            lock_ttl: options[:lock_ttl] || 1,
+            max_batch_size: options[:max_batch_size] || 1_000,
+            poll_interval: options[:poll_interval] || 3,
+            tests_env: options[:tests_env] || (
+              defined?(::Rails) && ::Rails.respond_to?(:env) && ::Rails.env.test?
+            )
+          )
+        end
 
-      # Option to override how Sidekiq::Grouping know about tests env
-      config_accessor :tests_env do
-        options[:tests_env] || (
-          defined?(::Rails) && Rails.respond_to?(:env) && Rails.env.test?
-        )
+        def options
+          @options ||=
+            begin
+              if Sidekiq.respond_to?(:[]) # Sidekiq 6.x
+                Sidekiq[:grouping] || {}
+              elsif Sidekiq.respond_to?(:options) # Sidekiq <= 5.x
+                Sidekiq.options[:grouping] || Sidekiq.options["grouping"] || {}
+              elsif Sidekiq.server?  # Sidekiq >= 7.x
+                Sidekiq::CLI.instance.config[:grouping] || {}
+              else
+                Sidekiq.default_configuration[:grouping] || {}
+              end
+           end
+        end
       end
     end
   end
diff --git a/lib/sidekiq/grouping/views/index.erb b/lib/sidekiq/grouping/views/index.erb
index b261ad2..e155458 100644
--- a/lib/sidekiq/grouping/views/index.erb
+++ b/lib/sidekiq/grouping/views/index.erb
@@ -25,8 +25,9 @@
           <td><%= batch.last_execution_time || "&ndash;"%></td>
           <td><%= batch.next_execution_time || "&ndash;"%></td>
           <td>
-            <form action="<%= "#{root_path}grouping/#{batch.name}/delete" %>" method="post">
+            <form action="<%= "#{root_path}grouping/#{Base64.urlsafe_encode64(batch.name)}" %>" method="post">
               <%= csrf_tag %>
+              <input type="hidden" name="_method" value="delete" />
               <input class="btn btn-danger btn-xs" type="submit" name="delete" value="Delete" data-confirm="Are you sure you want to delete this batch?" />
             </form>
           </td>
diff --git a/lib/sidekiq/grouping/web.rb b/lib/sidekiq/grouping/web.rb
index 007e6f0..5a13ea5 100644
--- a/lib/sidekiq/grouping/web.rb
+++ b/lib/sidekiq/grouping/web.rb
@@ -14,10 +14,11 @@ def self.registered(app)
               locals: { view_path: VIEWS }
         end
 
-        app.post "/grouping/:name/delete" do
+        app.delete "/grouping/:name64" do
+          name = Base64.decode64(params["name64"])
           worker_class, queue =
             Sidekiq::Grouping::Batch.extract_worker_klass_and_queue(
-              params["name"]
+              name
             )
           batch = Sidekiq::Grouping::Batch.new(worker_class, queue)
           batch.delete
@@ -28,5 +29,17 @@ def self.registered(app)
   end
 end
 
-Sidekiq::Web.register(Sidekiq::Grouping::Web)
-Sidekiq::Web.tabs["Grouping"] = "grouping"
+args = {
+  name: "grouping",
+  tab: ["Grouping"],
+  index: ["grouping"],
+  root_dir: File.dirname(__FILE__)
+}
+
+if Gem::Version.new(Sidekiq::VERSION) >= Gem::Version.new("8.0.0")
+  Sidekiq::Web.configure do |cfg|
+    cfg.register(Sidekiq::Grouping::Web, **args)
+  end
+else
+  Sidekiq::Web.register(Sidekiq::Grouping::Web, **args)
+end