diff --git a/Dockerfile b/Dockerfile
index f71e82939..46d5d77d6 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -5,7 +5,7 @@
 # Must override builder-base, not builder, since the latter is referred to later in the file and so must not be
 # directly replaced. See here, and note that "stage" parameter mentioned there has been renamed to
 # "build-context": https://github.com/docker/buildx/pull/904#issuecomment-1005871838
-FROM golang:1.25.9-bookworm@sha256:298734aec230b5f3e8cee450ce6d7eccc39f1797ba548ee90d57e9803030c6c3 AS builder-base
+FROM golang:1.26.4-bookworm@sha256:5d2b868674b57c9e48cdd39e891acce4196b6926ca6d11e9c270a8f85106203d AS builder-base
 FROM --platform=$BUILDPLATFORM builder-base AS builder
 
 ARG TARGETARCH
diff --git a/Dockerfile.windows b/Dockerfile.windows
index 4fe8d715a..c8d774b83 100644
--- a/Dockerfile.windows
+++ b/Dockerfile.windows
@@ -5,7 +5,7 @@
 # Must override builder-base, not builder, since the latter is referred to later in the file and so must not be
 # directly replaced. See here, and note that "stage" parameter mentioned there has been renamed to
 # "build-context": https://github.com/docker/buildx/pull/904#issuecomment-1005871838
-FROM --platform=linux/$BUILDARCH golang:1.25.9-bookworm@sha256:298734aec230b5f3e8cee450ce6d7eccc39f1797ba548ee90d57e9803030c6c3 AS builder-base
+FROM --platform=linux/$BUILDARCH golang:1.26.4-bookworm@sha256:5d2b868674b57c9e48cdd39e891acce4196b6926ca6d11e9c270a8f85106203d AS builder-base
 FROM --platform=linux/$BUILDARCH builder-base AS builder
 
 ARG TARGETARCH