diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8286d6836..15667f60d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,16 @@
 
 ## master (unreleased)
 
+### New features
+
+* [#277](https://github.com/rubocop/rubocop-ast/pull/277): Support Prism as a Ruby parser (experimental). ([@koic][])
+* [#276](https://github.com/rubocop-hq/rubocop-ast/pull/276): Support `Parser::Ruby34` for Ruby 3.4 parser (experimental). ([@koic][])
+
+### Changes
+
+* [#279](https://github.com/rubocop/rubocop-ast/pull/279): **(Compatibility)** Drop Ruby 2.6 runtime support. ([@koic][])
+* [#272](https://github.com/rubocop/rubocop-ast/pull/272): Make `Node#left_curly_brace?` aware of lambda brace. ([@koic][])
+
 ## 1.30.0 (2023-10-26)
 
 ### New features
diff --git a/changelog/change_drop_ruby_26_runtime_support.md b/changelog/change_drop_ruby_26_runtime_support.md
deleted file mode 100644
index fe024de66..000000000
--- a/changelog/change_drop_ruby_26_runtime_support.md
+++ /dev/null
@@ -1 +0,0 @@
-* [#279](https://github.com/rubocop/rubocop-ast/pull/279): **(Compatibility)** Drop Ruby 2.6 runtime support. ([@koic][])
diff --git a/changelog/change_make_token_left_curly_brace_aware_of_lambda_brace.md b/changelog/change_make_token_left_curly_brace_aware_of_lambda_brace.md
deleted file mode 100644
index b6352a25e..000000000
--- a/changelog/change_make_token_left_curly_brace_aware_of_lambda_brace.md
+++ /dev/null
@@ -1 +0,0 @@
-* [#272](https://github.com/rubocop/rubocop-ast/pull/272): Make `Node#left_curly_brace?` aware of lambda brace. ([@koic][])
diff --git a/changelog/new_support_prism.md b/changelog/new_support_prism.md
deleted file mode 100644
index 2143409c1..000000000
--- a/changelog/new_support_prism.md
+++ /dev/null
@@ -1 +0,0 @@
-* [#277](https://github.com/rubocop/rubocop-ast/pull/277): Support Prism as a Ruby parser (experimental). ([@koic][])
diff --git a/changelog/new_support_ruby_3_4_parser.md b/changelog/new_support_ruby_3_4_parser.md
deleted file mode 100644
index f29e785e9..000000000
--- a/changelog/new_support_ruby_3_4_parser.md
+++ /dev/null
@@ -1 +0,0 @@
-* [#276](https://github.com/rubocop-hq/rubocop-ast/pull/276): Support `Parser::Ruby34` for Ruby 3.4 parser (experimental). ([@koic][])