diff --git a/changelog.md b/changelog.md
index 5632ba24..c465f301 100644
--- a/changelog.md
+++ b/changelog.md
@@ -5,6 +5,9 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [x.x.x] - xxxx-xx-xx
+### Added
+- [scripts/build_nginx] Add njs module
+
 ### Changes
 - [cedar-14] Removed
 - rename master branch to main
diff --git a/nginx-heroku-16.tgz b/nginx-heroku-16.tgz
index ebe4dbea..40d8eb43 100644
Binary files a/nginx-heroku-16.tgz and b/nginx-heroku-16.tgz differ
diff --git a/nginx-heroku-18.tgz b/nginx-heroku-18.tgz
index 92eb6340..83ca198c 100644
Binary files a/nginx-heroku-18.tgz and b/nginx-heroku-18.tgz differ
diff --git a/nginx-heroku-20.tgz b/nginx-heroku-20.tgz
index 41dc241f..25099c92 100644
Binary files a/nginx-heroku-20.tgz and b/nginx-heroku-20.tgz differ
diff --git a/scripts/build_nginx b/scripts/build_nginx
index 5c08fca7..97066649 100755
--- a/scripts/build_nginx
+++ b/scripts/build_nginx
@@ -9,12 +9,14 @@ PCRE_VERSION=${PCRE_VERSION-8.44}
 HEADERS_MORE_VERSION=${HEADERS_MORE_VERSION-0.33}
 ZLIB_VERSION=${ZLIB_VERSION-1.2.11}
 UUID4_VERSION=${UUID4_VERSION-master}
+NJS_VERSION=${NJS_VERSION-0.5.3}
 
 nginx_tarball_url=https://nginx.org/download/nginx-${NGINX_VERSION}.tar.gz
 pcre_tarball_url=https://ftp.pcre.org/pub/pcre/pcre-${PCRE_VERSION}.tar.gz
 headers_more_nginx_module_url=https://github.com/openresty/headers-more-nginx-module/archive/v${HEADERS_MORE_VERSION}.tar.gz
 uuid4_url=https://github.com/cybozu/nginx-uuid4-module/archive/${UUID4_VERSION}.tar.gz
 zlib_url=http://zlib.net/zlib-${ZLIB_VERSION}.tar.gz
+njs_url=https://github.com/nginx/njs/archive/${NJS_VERSION}.tar.gz
 
 temp_dir=$(mktemp -d /tmp/nginx.XXXXXXXXXX)
 
@@ -36,6 +38,10 @@ echo "Downloading $zlib_url"
 echo "Downloading $uuid4_url"
 (cd nginx-${NGINX_VERSION} && curl -L $uuid4_url | tar xvz )
 
+echo "Downloading $njs_url"
+(cd nginx-${NGINX_VERSION} && curl -L $njs_url | tar xvz )
+ls -l ${temp_dir}/nginx-${NGINX_VERSION}
+
 # This will build `nginx`
 (
   cd nginx-${NGINX_VERSION}
@@ -47,7 +53,8 @@ echo "Downloading $uuid4_url"
     --with-http_ssl_module \
     --prefix=/tmp/nginx \
     --add-module=${temp_dir}/nginx-${NGINX_VERSION}/headers-more-nginx-module-${HEADERS_MORE_VERSION} \
-    --add-module=${temp_dir}/nginx-${NGINX_VERSION}/nginx-uuid4-module-${UUID4_VERSION}
+    --add-module=${temp_dir}/nginx-${NGINX_VERSION}/nginx-uuid4-module-${UUID4_VERSION} \
+    --add-module=${temp_dir}/nginx-${NGINX_VERSION}/njs-${NJS_VERSION}/nginx
   make install
 )
 
@@ -63,7 +70,8 @@ echo "Downloading $uuid4_url"
     --with-http_ssl_module \
     --prefix=/tmp/nginx-debug \
     --add-module=${temp_dir}/nginx-${NGINX_VERSION}/headers-more-nginx-module-${HEADERS_MORE_VERSION} \
-    --add-module=${temp_dir}/nginx-${NGINX_VERSION}/nginx-uuid4-module-${UUID4_VERSION}
+    --add-module=${temp_dir}/nginx-${NGINX_VERSION}/nginx-uuid4-module-${UUID4_VERSION} \
+    --add-module=${temp_dir}/nginx-${NGINX_VERSION}/njs-${NJS_VERSION}/nginx
   make install
 )