diff --git a/Makefile b/Makefile
index f1fe8bc7..280ac6c6 100644
--- a/Makefile
+++ b/Makefile
@@ -55,7 +55,7 @@ DOCKER_BUILDX_PUSH            := $(DOCKER_BUILDX) --push
 DOCKER_BUILDX_PUSH_X_PLATFORM := $(DOCKER_BUILDX_PUSH) --platform ${DOCKER_BUILD_PLATFORM}
 
 DOCKER_BUILD_PLATFORM_ALPINE         ?= linux/amd64,linux/arm64,linux/ppc64le,linux/arm/v6,linux/arm/v7,linux/s390x
-DOCKER_BUILD_RUNTIME_IMAGE_ALPINE    ?= alpine:3.21.2
+DOCKER_BUILD_RUNTIME_IMAGE_ALPINE    ?= alpine:3.21.3
 DOCKER_BUILDX_ARGS_ALPINE            ?= --build-arg RUNTIME_IMAGE=${DOCKER_BUILD_RUNTIME_IMAGE_ALPINE} ${DOCKER_BUILDX_COMMON_ARGS}
 DOCKER_BUILDX_X_PLATFORM_ALPINE      := docker buildx build ${DOCKER_BUILDX_ARGS_ALPINE} --platform ${DOCKER_BUILD_PLATFORM_ALPINE}
 DOCKER_BUILDX_PUSH_X_PLATFORM_ALPINE := $(DOCKER_BUILDX_X_PLATFORM_ALPINE) --push