diff --git a/Gemfile b/Gemfile
index e570bdf4..95424ced 100644
--- a/Gemfile
+++ b/Gemfile
@@ -6,7 +6,7 @@ group :development do
   gem "rake"
   gem "rubocop", require: false
   gem "rubocop_auto_corrector", require: false
-  gem "ruby_header_parser"
+  gem "ruby_header_parser", ">= 0.3.0"
   gem "yard"
 end
 
diff --git a/Gemfile.lock b/Gemfile.lock
index 825b24b8..92ddb9fc 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -112,7 +112,7 @@ GEM
     rubocop_auto_corrector (0.5.0)
       rubocop (>= 1.30.0)
     ruby-progressbar (1.13.0)
-    ruby_header_parser (0.2.0)
+    ruby_header_parser (0.3.0)
     securerandom (0.3.1)
     serverspec (2.42.3)
       multi_json
@@ -168,7 +168,7 @@ DEPENDENCIES
   rspec-temp_dir
   rubocop
   rubocop_auto_corrector
-  ruby_header_parser
+  ruby_header_parser (>= 0.3.0)
   serverspec
   steep
   test-unit
diff --git a/ruby/function_generated.go b/ruby/function_generated.go
index 8a5a061a..db53052e 100644
--- a/ruby/function_generated.go
+++ b/ruby/function_generated.go
@@ -14,6 +14,42 @@ import (
 	"unsafe"
 )
 
+// RARRAY_ASET calls `RARRAY_ASET` in C
+//
+// Original definition is following
+//
+//	RARRAY_ASET(VALUE ary, long i, VALUE v)
+func RARRAY_ASET(ary VALUE, i Long, v VALUE) {
+	C.RARRAY_ASET(C.VALUE(ary), C.long(i), C.VALUE(v))
+}
+
+// RARRAY_EMBED_LEN calls `RARRAY_EMBED_LEN` in C
+//
+// Original definition is following
+//
+//	RARRAY_EMBED_LEN(VALUE ary)
+func RARRAY_EMBED_LEN(ary VALUE) Long {
+	return Long(C.RARRAY_EMBED_LEN(C.VALUE(ary)))
+}
+
+// RARRAY_LENINT calls `RARRAY_LENINT` in C
+//
+// Original definition is following
+//
+//	RARRAY_LENINT(VALUE ary)
+func RARRAY_LENINT(ary VALUE) int {
+	return int(C.RARRAY_LENINT(C.VALUE(ary)))
+}
+
+// RARRAY_PTR calls `RARRAY_PTR` in C
+//
+// Original definition is following
+//
+//	RARRAY_PTR(VALUE ary)
+func RARRAY_PTR(ary VALUE) *VALUE {
+	return (*VALUE)(C.RARRAY_PTR(C.VALUE(ary)))
+}
+
 // RB_BUILTIN_TYPE calls `RB_BUILTIN_TYPE` in C
 //
 // Original definition is following
diff --git a/ruby/ruby_internal_core_rarray.go b/ruby/ruby_internal_core_rarray.go
new file mode 100644
index 00000000..590b882d
--- /dev/null
+++ b/ruby/ruby_internal_core_rarray.go
@@ -0,0 +1,18 @@
+package ruby
+
+/*
+#include "ruby.h"
+*/
+import "C"
+
+// c.f. https://github.com/ruby/ruby/blob/master/include/ruby/internal/core/rarray.h
+
+// RARRAY_LEN is alias to [RbArrayLen]
+func RARRAY_LEN(a VALUE) Long {
+	return RbArrayLen(a)
+}
+
+// RARRAY_CONST_PTR is alias to [RbArrayConstPtr]
+func RARRAY_CONST_PTR(a VALUE) *VALUE {
+	return RbArrayConstPtr(a)
+}