diff --git a/spec/lib/protobuf/rpc/stat_spec.rb b/spec/lib/protobuf/rpc/stat_spec.rb
index <HASH>..<HASH> 100644
--- a/spec/lib/protobuf/rpc/stat_spec.rb
+++ b/spec/lib/protobuf/rpc/stat_spec.rb
@@ -1,6 +1,6 @@
 require 'spec_helper'
 require 'timecop'
-require 'active_support/core_ext/numeric/time'
+require 'active_support/all'
 
 RSpec.describe ::Protobuf::Rpc::Stat do
Use activesupport/all in tests (>= 6 causes load errors)