diff --git a/Dockerfile b/Dockerfile
index 91085b7..1d43704 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,6 +1,6 @@
-ARG NGINX_VERSION=1.21.6
+ARG NGINX_VERSION=1.23.1
 ARG NGINX_RTMP_VERSION=1.2.2
-ARG FFMPEG_VERSION=5.0
+ARG FFMPEG_VERSION=5.1
 
 ##############################
 # Build the NGINX-build image.
diff --git a/Dockerfile.cuda b/Dockerfile.cuda
index 3c0a484..467d19d 100644
--- a/Dockerfile.cuda
+++ b/Dockerfile.cuda
@@ -1,6 +1,6 @@
-ARG NGINX_VERSION=1.21.6
+ARG NGINX_VERSION=1.23.1
 ARG NGINX_RTMP_VERSION=1.2.2
-ARG FFMPEG_VERSION=5.0
+ARG FFMPEG_VERSION=5.1
 
 ##############################
 # Build the NGINX-build image.
diff --git a/README.md b/README.md
index 37f65ed..45254bd 100644
--- a/README.md
+++ b/README.md
@@ -2,9 +2,9 @@
 A Dockerfile installing NGINX, nginx-rtmp-module and FFmpeg from source with
 default settings for HLS live streaming. Built on Alpine Linux.
 
-* Nginx 1.21.6 (Mainline version compiled from source)
+* Nginx 1.23.1 (Mainline version compiled from source)
 * nginx-rtmp-module 1.2.2 (compiled from source)
-* ffmpeg 5.0 (compiled from source)
+* ffmpeg 5.1 (compiled from source)
 * Default HLS settings (See: [nginx.conf](nginx.conf))
 
 [![Docker Stars](https://img.shields.io/docker/stars/alfg/nginx-rtmp.svg)](https://hub.docker.com/r/alfg/nginx-rtmp/)