diff --git a/Dockerfile b/Dockerfile
index f1dd591af5..87d7c86303 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,7 +1,7 @@
 # syntax=docker/dockerfile:1
 
 ARG BASE_VARIANT=alpine
-ARG ALPINE_VERSION=3.20
+ARG ALPINE_VERSION=3.21
 ARG BASE_DEBIAN_DISTRO=bookworm
 
 ARG GO_VERSION=1.23.5
diff --git a/dockerfiles/Dockerfile.authors b/dockerfiles/Dockerfile.authors
index 9524824860..35d7928314 100644
--- a/dockerfiles/Dockerfile.authors
+++ b/dockerfiles/Dockerfile.authors
@@ -1,6 +1,6 @@
 # syntax=docker/dockerfile:1
 
-ARG ALPINE_VERSION=3.20
+ARG ALPINE_VERSION=3.21
 
 FROM alpine:${ALPINE_VERSION} AS gen
 RUN apk add --no-cache bash git
diff --git a/dockerfiles/Dockerfile.dev b/dockerfiles/Dockerfile.dev
index 445b34f2d9..f283c37c8c 100644
--- a/dockerfiles/Dockerfile.dev
+++ b/dockerfiles/Dockerfile.dev
@@ -1,7 +1,7 @@
 # syntax=docker/dockerfile:1
 
 ARG GO_VERSION=1.23.5
-ARG ALPINE_VERSION=3.20
+ARG ALPINE_VERSION=3.21
 
 ARG BUILDX_VERSION=0.17.1
 FROM docker/buildx-bin:${BUILDX_VERSION} AS buildx
diff --git a/dockerfiles/Dockerfile.lint b/dockerfiles/Dockerfile.lint
index c9bce8d8a2..86991041d8 100644
--- a/dockerfiles/Dockerfile.lint
+++ b/dockerfiles/Dockerfile.lint
@@ -1,7 +1,7 @@
 # syntax=docker/dockerfile:1
 
 ARG GO_VERSION=1.23.5
-ARG ALPINE_VERSION=3.20
+ARG ALPINE_VERSION=3.21
 ARG GOLANGCI_LINT_VERSION=v1.62.2
 
 FROM golangci/golangci-lint:${GOLANGCI_LINT_VERSION}-alpine AS golangci-lint
diff --git a/dockerfiles/Dockerfile.vendor b/dockerfiles/Dockerfile.vendor
index be512a0d5e..921fa24074 100644
--- a/dockerfiles/Dockerfile.vendor
+++ b/dockerfiles/Dockerfile.vendor
@@ -1,7 +1,7 @@
 # syntax=docker/dockerfile:1
 
 ARG GO_VERSION=1.23.5
-ARG ALPINE_VERSION=3.20
+ARG ALPINE_VERSION=3.21
 ARG MODOUTDATED_VERSION=v0.8.0
 
 FROM golang:${GO_VERSION}-alpine${ALPINE_VERSION} AS base