diff --git a/activejob/lib/active_job/base.rb b/activejob/lib/active_job/base.rb
index 2b2a59e969..95b1062701 100644
--- a/activejob/lib/active_job/base.rb
+++ b/activejob/lib/active_job/base.rb
@@ -60,7 +60,6 @@ module ActiveJob #:nodoc:
   # * SerializationError - Error class for serialization errors.
   class Base
     include Core
-    include Serializers
     include QueueAdapter
     include QueueName
     include QueuePriority
diff --git a/activejob/lib/active_job/serializers.rb b/activejob/lib/active_job/serializers.rb
index df66e66659..a5d90f48b8 100644
--- a/activejob/lib/active_job/serializers.rb
+++ b/activejob/lib/active_job/serializers.rb
@@ -7,7 +7,6 @@ module ActiveJob
   # and to add new ones. It also has helpers to serialize/deserialize objects.
   module Serializers # :nodoc:
     extend ActiveSupport::Autoload
-    extend ActiveSupport::Concern
 
     autoload :ObjectSerializer
     autoload :SymbolSerializer