diff --git a/Dockerfile b/Dockerfile
index 05911f4..5e1501e 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,6 +1,6 @@
 FROM alpine:3.14.1 as xmrig-builder
 RUN apk add git make cmake libstdc++ gcc g++ automake libtool autoconf linux-headers
-ARG XMRIG_VERSION=6.18.0-mo1
+ARG XMRIG_VERSION=6.21.1-mo1
 RUN git clone https://github.com/moneroocean/xmrig.git --branch v${XMRIG_VERSION}
 RUN mkdir xmrig/build \
 	&& cd xmrig/scripts \
diff --git a/README.md b/README.md
index c94612b..598fd5f 100644
--- a/README.md
+++ b/README.md
@@ -3,7 +3,7 @@ A tiny docker container for quickly getting up and running with the MoneroOcean
 
 ![Docker Image Size (latest by date)](https://img.shields.io/docker/image-size/thelolagemann/xmrig-mo?style=flat-square)
 ![GitHub Workflow Status](https://img.shields.io/github/workflow/status/thelolagemann/docker-xmrig-mo/Build%20and%20publish%20docker%20image?style=flat-square)
-![Xmrig Version](https://img.shields.io/badge/xmrig-v6.18.0-orange?style=flat-square)
+![Xmrig Version](https://img.shields.io/badge/xmrig-v6.21.1-orange?style=flat-square)
 ### Table of Contents
 * [Quick Start](#quick-start)
 * [Usage](#usage)
@@ -158,4 +158,4 @@ build arguments you can pass during build.
 
 | Argument        | Description                      | Default      |
 |-----------------|----------------------------------|--------------|
-| `XMRIG_VERSION` | The version of xmrig-mo to build | `6.18.0-mo1` |
+| `XMRIG_VERSION` | The version of xmrig-mo to build | `6.21.1-mo1` |