diff --git a/lib/optparse.rb b/lib/optparse.rb
index 4f7d7c899d..fad204b72a 100644
--- a/lib/optparse.rb
+++ b/lib/optparse.rb
@@ -2000,4 +2000,5 @@ end
 # ARGV is arguable by OptionParser
 ARGV.extend(OptionParser::Arguable)
 
-OptParse = OptionParser
+# An alias for OptionParser.
+OptParse = OptionParser  # :nodoc:
diff --git a/version.h b/version.h
index 93fde0867d..3a25b78111 100644
--- a/version.h
+++ b/version.h
@@ -1,6 +1,6 @@
 #define RUBY_VERSION "2.2.7"
 #define RUBY_RELEASE_DATE "2017-03-26"
-#define RUBY_PATCHLEVEL 454
+#define RUBY_PATCHLEVEL 455
 
 #define RUBY_RELEASE_YEAR 2017
 #define RUBY_RELEASE_MONTH 3