diff --git a/tool/test-bundled-gems.rb b/tool/test-bundled-gems.rb
index f130301ffd..6312e1872d 100644
--- a/tool/test-bundled-gems.rb
+++ b/tool/test-bundled-gems.rb
@@ -27,7 +27,7 @@ File.foreach("#{gem_dir}/bundled_gems") do |line|
   if gem == "typeprof"
     rbs_build_dir = 'ext/-test-/gems/rbs'
     raise "need to run rbs test suite before typeprof" unless File.readable?("#{rbs_build_dir}/rbs_extension.#{RbConfig::CONFIG['DLEXT']}")
-    ENV["RUBYLIB"] = ["#{gem_dir}/src/rbs/lib", ENV.fetch("RUBYLIB", nil)].compact.join(":")
+    ENV["RUBYLIB"] = ["#{gem_dir}/src/rbs/lib", ENV.fetch("RUBYLIB", nil)].compact.join(File::PATH_SEPARATOR)
   end
 
   if gem == "rbs"
@@ -41,7 +41,7 @@ File.foreach("#{gem_dir}/bundled_gems") do |line|
     extconf_path = File.expand_path('../../gems/src/rbs/ext/rbs_extension/extconf.rb', __FILE__)
     system("#{ruby} -C #{build_dir} #{extconf_path}") or raise
     system("cd #{build_dir} && make extout=../../../../.ext libdir=../../../..") or raise
-    ENV["RUBYLIB"] = [File.expand_path(dummy_rake_compiler_dir), File.expand_path(build_dir), ENV.fetch("RUBYLIB", nil)].compact.join(":")
+    ENV["RUBYLIB"] = [File.expand_path(dummy_rake_compiler_dir), File.expand_path(build_dir), ENV.fetch("RUBYLIB", nil)].compact.join(File::PATH_SEPARATOR)
   end
 
   if gem == "minitest"
@@ -56,7 +56,7 @@ File.foreach("#{gem_dir}/bundled_gems") do |line|
     extconf_path = File.expand_path('../../gems/src/debug/ext/debug/extconf.rb', __FILE__)
     system("#{ruby} -C #{build_dir} #{extconf_path}") or raise
     system("cd #{build_dir} && make extout=../../../../.ext libdir=../../../..") or raise
-    ENV["RUBYLIB"] = [File.expand_path(build_dir + "/.."), ENV.fetch("RUBYLIB", nil)].compact.join(":")
+    ENV["RUBYLIB"] = [File.expand_path(build_dir + "/.."), ENV.fetch("RUBYLIB", nil)].compact.join(File::PATH_SEPARATOR)
   end
 
   print "[command]" if github_actions
diff --git a/version.h b/version.h
index 7580b01561..e24dfabf6d 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 74
+#define RUBY_PATCHLEVEL 75
 
 #define RUBY_RELEASE_YEAR 2022
 #define RUBY_RELEASE_MONTH 10