diff --git a/docker/2.0-openssl/Dockerfile b/docker/2.0-openssl/Dockerfile
index 652f6971..8c6e54ac 100644
--- a/docker/2.0-openssl/Dockerfile
+++ b/docker/2.0-openssl/Dockerfile
@@ -1,10 +1,10 @@
-FROM alpine:3.20
+FROM alpine:3.21
 
 LABEL maintainer="Roger Light <roger@atchoo.org>" \
     description="Eclipse Mosquitto MQTT Broker"
 
-ENV VERSION=2.0.20 \
-    DOWNLOAD_SHA256=ebd07d89d2a446a7f74100ad51272e4a8bf300b61634a7812e19f068f2759de8 \
+ENV VERSION=2.0.21 \
+    DOWNLOAD_SHA256=7ad5e84caeb8d2bb6ed0c04614b2a7042def961af82d87f688ba33db857b899d \
     GPG_KEYS=A0D6EEA1DCAE49A635A3B2F0779B22DFB3E717B7 \
     LWS_VERSION=4.2.1 \
     LWS_SHA256=842da21f73ccba2be59e680de10a8cce7928313048750eb6ad73b6fa50763c51