diff --git a/testutil/promrated/Dockerfile b/testutil/promrated/Dockerfile
index f5226b11e..76a109f4f 100644
--- a/testutil/promrated/Dockerfile
+++ b/testutil/promrated/Dockerfile
@@ -1,4 +1,4 @@
-FROM golang:1.25.7-alpine AS builder
+FROM golang:1.26.0-alpine AS builder
 
 # Install dependencies
 RUN apk add --no-cache build-base git