diff --git a/Dockerfile b/Dockerfile
index 2bbe52b62..20131da25 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 # Container for building Go binary.
-FROM golang:1.26.4-trixie AS builder
+FROM golang:1.26.5-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 82e51e217..d9ea8b36f 100644
--- a/testutil/promrated/Dockerfile
+++ b/testutil/promrated/Dockerfile
@@ -1,4 +1,4 @@
-FROM golang:1.26.4-alpine AS builder
+FROM golang:1.26.5-alpine AS builder
 
 # Install dependencies
 RUN apk add --no-cache build-base git