diff --git a/src/core/nginx.h b/src/core/nginx.h
index 8fe782faa..17f33a074 100644
--- a/src/core/nginx.h
+++ b/src/core/nginx.h
@@ -9,8 +9,8 @@
 #define _NGINX_H_INCLUDED_
 
 
-#define nginx_version      1013008
-#define NGINX_VERSION      "1.13.8"
+#define nginx_version      1013009
+#define NGINX_VERSION      "1.13.9"
 #define NGINX_VER          "nginx/" NGINX_VERSION
 
 #ifdef NGX_BUILD