diff --git a/activemodel/lib/active_model/serialization.rb b/activemodel/lib/active_model/serialization.rb
index 168dfa0dd2..d10a674bc7 100644
--- a/activemodel/lib/active_model/serialization.rb
+++ b/activemodel/lib/active_model/serialization.rb
@@ -1,8 +1,5 @@
 # frozen_string_literal: true
 
-require "active_support/core_ext/hash/except"
-require "active_support/core_ext/hash/slice"
-
 module ActiveModel
   # == Active \Model \Serialization
   #