diff --git a/prometheus-php-fpm-exporter/Dockerfile b/prometheus-php-fpm-exporter/Dockerfile
index e4284de..d1caadf 100644
--- a/prometheus-php-fpm-exporter/Dockerfile
+++ b/prometheus-php-fpm-exporter/Dockerfile
@@ -1,5 +1,5 @@
 # syntax=docker/dockerfile:1
-FROM --platform=$BUILDPLATFORM golang:1.20-alpine AS builder
+FROM --platform=$BUILDPLATFORM golang:1.21-alpine AS builder
 
 ARG TARGETOS
 ARG TARGETARCH