diff --git a/Gemfile b/Gemfile
index 95424ced..b1d1f6d3 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", ">= 0.3.0"
+  gem "ruby_header_parser", ">= 0.3.1"
   gem "yard"
 end
 
diff --git a/Gemfile.lock b/Gemfile.lock
index 33f134a0..13ea586e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -113,7 +113,7 @@ GEM
     rubocop_auto_corrector (0.5.0)
       rubocop (>= 1.30.0)
     ruby-progressbar (1.13.0)
-    ruby_header_parser (0.3.0)
+    ruby_header_parser (0.3.1)
     securerandom (0.4.0)
     serverspec (2.42.3)
       multi_json
@@ -170,7 +170,7 @@ DEPENDENCIES
   rspec-temp_dir
   rubocop
   rubocop_auto_corrector
-  ruby_header_parser (>= 0.3.0)
+  ruby_header_parser (>= 0.3.1)
   serverspec
   steep
   test-unit
diff --git a/ruby/function_generated.go b/ruby/function_generated.go
index db53052e..84e5a230 100644
--- a/ruby/function_generated.go
+++ b/ruby/function_generated.go
@@ -4049,9 +4049,7 @@ func RbGcMarkMovable(obj VALUE) {
 //
 //	void rb_gc_register_address(VALUE *valptr)
 func RbGcRegisterAddress(valptr *VALUE) {
-	var cValptr C.VALUE
-	C.rb_gc_register_address(&cValptr)
-	*valptr = VALUE(cValptr)
+	C.rb_gc_register_address((*C.VALUE)(valptr))
 }
 
 // RbGcRegisterMarkObject calls `rb_gc_register_mark_object` in C
@@ -4087,9 +4085,7 @@ func RbGcStat(key_or_buf VALUE) SizeT {
 //
 //	void rb_gc_unregister_address(VALUE *valptr)
 func RbGcUnregisterAddress(valptr *VALUE) {
-	var cValptr C.VALUE
-	C.rb_gc_unregister_address(&cValptr)
-	*valptr = VALUE(cValptr)
+	C.rb_gc_unregister_address((*C.VALUE)(valptr))
 }
 
 // RbGcUpdateTblRefs calls `rb_gc_update_tbl_refs` in C