diff --git a/images/cfssl/rootfs/Dockerfile b/images/cfssl/rootfs/Dockerfile
index 5713a9073f..e37e99118d 100644
--- a/images/cfssl/rootfs/Dockerfile
+++ b/images/cfssl/rootfs/Dockerfile
@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-FROM alpine:3.12
+FROM alpine:3.21.0
 
 RUN echo "@testing http://nl.alpinelinux.org/alpine/edge/testing" >> /etc/apk/repositories
 RUN apk add --no-cache \