diff --git a/Dockerfile b/Dockerfile
index bc74ff7..f63a2a5 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,6 +1,6 @@
-FROM golang:1.20
+FROM golang:1.21
 
-ARG upx_version=4.0.2
+ARG upx_version=4.1.0
 ARG GOPROXY
 
 SHELL ["/bin/bash", "-o", "pipefail", "-c"]
diff --git a/README.md b/README.md
index e921b66..cf2d48a 100644
--- a/README.md
+++ b/README.md
@@ -10,7 +10,7 @@ See [Docker Hub](https://hub.docker.com/r/devopsworks/golang-upx) for final imag
 ## Usage
 
 ```dockerfile
-FROM devopsworks/golang-upx:1.16 as builder
+FROM devopsworks/golang-upx:1.21 as builder
 
 WORKDIR /src