diff --git a/Dockerfile b/Dockerfile
index 437da5bf2..111516b46 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 # Container for building Go binary.
-FROM golang:1.26.2-trixie AS builder
+FROM golang:1.26.3-trixie AS builder
 # Install dependencies
 RUN apt-get update && apt-get install -y --no-install-recommends build-essential git
 
diff --git a/testutil/promrated/Dockerfile b/testutil/promrated/Dockerfile
index d59b18210..a4c43bb4e 100644
--- a/testutil/promrated/Dockerfile
+++ b/testutil/promrated/Dockerfile
@@ -1,4 +1,4 @@
-FROM golang:1.26.2-alpine AS builder
+FROM golang:1.26.3-alpine AS builder
 
 # Install dependencies
 RUN apk add --no-cache build-base git