diff --git a/CHANGELOG.md b/CHANGELOG.md
index 11d7bd710..94a13961a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,8 @@
 
 ## Master (Unreleased)
 
+* Fix merging RSpec DSL configuration from third-party gems. ([@pirj][])
+
 ## 2.5.0 (2021-09-21)
 
 * Declare autocorrect as unsafe for `ExpectChange`. ([@francois-ferrandis][])
diff --git a/config/default.yml b/config/default.yml
index 5f2dd7f99..1f3c5e94f 100644
--- a/config/default.yml
+++ b/config/default.yml
@@ -5,7 +5,20 @@ RSpec:
     - "**/*_spec.rb"
     - "**/spec/**/*"
   Language:
+    inherit_mode:
+      merge:
+        - Expectations
+        - Helpers
+        - Hooks
+        - HookScopes
+        - Runners
+        - Subjects
     ExampleGroups:
+      inherit_mode:
+        merge:
+          - Regular
+          - Skipped
+          - Focused
       Regular:
         - describe
         - context
@@ -20,6 +33,12 @@ RSpec:
         - fcontext
         - ffeature
     Examples:
+      inherit_mode:
+        merge:
+          - Regular
+          - Skipped
+          - Focused
+          - Pending
       Regular:
         - it
         - specify
@@ -62,6 +81,10 @@ RSpec:
       - all
       - suite
     Includes:
+      inherit_mode:
+        merge:
+          - Examples
+          - Context
       Examples:
         - it_behaves_like
         - it_should_behave_like
@@ -73,6 +96,10 @@ RSpec:
       - to_not
       - not_to
     SharedGroups:
+      inherit_mode:
+        merge:
+          - Examples
+          - Context
       Examples:
         - shared_examples
         - shared_examples_for
diff --git a/docs/modules/ROOT/pages/third_party_rspec_syntax_extensions.adoc b/docs/modules/ROOT/pages/third_party_rspec_syntax_extensions.adoc
index 960a600b1..1b78f6d9d 100644
--- a/docs/modules/ROOT/pages/third_party_rspec_syntax_extensions.adoc
+++ b/docs/modules/ROOT/pages/third_party_rspec_syntax_extensions.adoc
@@ -8,6 +8,8 @@ RuboCop https://docs.rubocop.org/rubocop/configuration.html#inheriting-configura
 
 == Packaging configuration for RuboCop RSpec
 
+NOTE: Due to a [bug](https://github.com/rubocop/rubocop-rspec/issues/1126), this feature doesn't work properly for `rubocop-rspec` 2.5.0 and earlier versions.
+
 For a third-party gem, it's sufficient to follow three steps:
 
 1. Provide a configuration file (e.g. `.rubocop_rspec_alias_config.yml` or `config/rubocop-rspec.yml`).