diff --git a/.jenkins/Jenkinsfile b/.jenkins/Jenkinsfile
index a12c16c..747dc66 100644
--- a/.jenkins/Jenkinsfile
+++ b/.jenkins/Jenkinsfile
@@ -15,7 +15,7 @@ pipeline {
 		BUILDX_NAME  = "${IMAGE}_${GIT_BRANCH}"
 		BRANCH_LOWER = "${BRANCH_NAME.toLowerCase().replaceAll('/', '-')}"
 		// Software versions; OpenResty does not support Lua >= 5.2
-		OPENRESTY_VERSION = '1.19.9.1'
+		OPENRESTY_VERSION = '1.21.4.1'
 		CROWDSEC_OPENRESTY_BOUNCER_VERSION = '0.1.7'
 		LUA_VERSION       = '5.1.5'
 		LUAROCKS_VERSION  = '3.3.1'
diff --git a/README.md b/README.md
index 5f34592..2164366 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,7 @@
 # nginx-full
 
 <p>
-  <img src="https://img.shields.io/badge/openresty-1.19.9.1-green.svg?style=for-the-badge">
+  <img src="https://img.shields.io/badge/openresty-1.21.4.1-green.svg?style=for-the-badge">
   <img src="https://img.shields.io/badge/lua-5.1.5-green.svg?style=for-the-badge">
   <img src="https://img.shields.io/badge/luarocks-3.3.1-green.svg?style=for-the-badge">
   <a href="https://hub.docker.com/repository/docker/nginxproxymanager/nginx-full">
diff --git a/local-build.sh b/local-build.sh
index b48d767..d652f37 100755
--- a/local-build.sh
+++ b/local-build.sh
@@ -8,7 +8,7 @@ RESET='\E[0m'
 
 DOCKER_IMAGE=nginxproxymanager/nginx-full
 
-export OPENRESTY_VERSION=1.19.9.1
+export OPENRESTY_VERSION=1.21.4.1
 export CROWDSEC_OPENRESTY_BOUNCER_VERSION=0.1.7
 export LUA_VERSION=5.1.5
 export LUAROCKS_VERSION=3.3.1