diff --git a/cluster/images/Dockerfile b/cluster/images/Dockerfile
index 8e05888b..e61041cc 100644
--- a/cluster/images/Dockerfile
+++ b/cluster/images/Dockerfile
@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-FROM alpine:3.20.3
+FROM alpine:3.21.0
 
 ARG BINARY
 RUN sed -i 's/dl-cdn.alpinelinux.org/mirrors.ustc.edu.cn/g' /etc/apk/repositories
diff --git a/cluster/images/build-web.Dockerfile b/cluster/images/build-web.Dockerfile
index a8e99549..56b17a17 100644
--- a/cluster/images/build-web.Dockerfile
+++ b/cluster/images/build-web.Dockerfile
@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-FROM alpine:3.20.3
+FROM alpine:3.21.0
 
 ARG BINARY
 ARG TARGETPLATFORM
diff --git a/cluster/images/buildx.Dockerfile b/cluster/images/buildx.Dockerfile
index 1f5817e5..3c0162fa 100644
--- a/cluster/images/buildx.Dockerfile
+++ b/cluster/images/buildx.Dockerfile
@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-FROM alpine:3.20.3
+FROM alpine:3.21.0
 
 ARG BINARY
 ARG TARGETPLATFORM