diff --git a/Dockerfile b/Dockerfile
index 20131da25..c9cc3b819 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 # Container for building Go binary.
-FROM golang:1.26.5-trixie AS builder
+FROM golang:1.26.6-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 d9ea8b36f..b7029fff2 100644
--- a/testutil/promrated/Dockerfile
+++ b/testutil/promrated/Dockerfile
@@ -1,4 +1,4 @@
-FROM golang:1.26.5-alpine AS builder
+FROM golang:1.26.6-alpine AS builder
 
 # Install dependencies
 RUN apk add --no-cache build-base git