diff --git a/src/core/nginx.h b/src/core/nginx.h
index 4466b3c62..a79b577d5 100644
--- a/src/core/nginx.h
+++ b/src/core/nginx.h
@@ -8,7 +8,7 @@
 #define _NGINX_H_INCLUDED_
 
 
-#define NGINX_VERSION      "0.5.20"
+#define NGINX_VERSION      "0.5.21"
 #define NGINX_VER          "nginx/" NGINX_VERSION
 
 #define NGINX_VAR          "NGINX"
diff --git a/src/http/modules/perl/nginx.pm b/src/http/modules/perl/nginx.pm
index d6f47c078..dd75ec8e3 100644
--- a/src/http/modules/perl/nginx.pm
+++ b/src/http/modules/perl/nginx.pm
@@ -47,7 +47,7 @@ our @EXPORT = qw(
     HTTP_INSUFFICIENT_STORAGE
 );
 
-our $VERSION = '0.5.20';
+our $VERSION = '0.5.21';
 
 require XSLoader;
 XSLoader::load('nginx', $VERSION);