diff --git a/lib/mkmf.rb b/lib/mkmf.rb
index ff854b3c30..32829e42fc 100644
--- a/lib/mkmf.rb
+++ b/lib/mkmf.rb
@@ -67,7 +67,7 @@ module MakeMakefile
   C_EXT = %w[c m]
 
   ##
-  # Extensions for files complied with a C++ compiler
+  # Extensions for files compiled with a C++ compiler
 
   CXX_EXT = %w[cc mm cxx cpp]
   unless File.exist?(File.join(*File.split(__FILE__).tap {|d, b| b.swapcase}))
@@ -2114,7 +2114,7 @@ preload = #{defined?($preload) && $preload ? $preload.join(' ') : ''}
   end
   # :startdoc:
 
-  # creates a stub Makefile.
+  # Creates a stub Makefile.
   #
   def dummy_makefile(srcdir)
     configuration(srcdir) << <<RULES << CLEANINGS
diff --git a/version.h b/version.h
index 44e0002976..28259f7b3d 100644
--- a/version.h
+++ b/version.h
@@ -11,7 +11,7 @@
 # define RUBY_VERSION_MINOR RUBY_API_VERSION_MINOR
 #define RUBY_VERSION_TEENY 3
 #define RUBY_RELEASE_DATE RUBY_RELEASE_YEAR_STR"-"RUBY_RELEASE_MONTH_STR"-"RUBY_RELEASE_DAY_STR
-#define RUBY_PATCHLEVEL 128
+#define RUBY_PATCHLEVEL 129
 
 #define RUBY_RELEASE_YEAR 2022
 #define RUBY_RELEASE_MONTH 10