diff --git a/docker/1.6-openssl/Dockerfile b/docker/1.6-openssl/Dockerfile
index 025d85f1..8c98d8ad 100644
--- a/docker/1.6-openssl/Dockerfile
+++ b/docker/1.6-openssl/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.14
+FROM alpine:3.18
 
 LABEL maintainer="Roger Light <roger@atchoo.org>" \
     description="Eclipse Mosquitto MQTT Broker"
diff --git a/docker/generic/Dockerfile b/docker/generic/Dockerfile
index 656f8a15..b7970bfb 100644
--- a/docker/generic/Dockerfile
+++ b/docker/generic/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.14
+FROM alpine:3.18
 
 LABEL maintainer="Roger Light <roger@atchoo.org>" \
     description="Eclipse Mosquitto MQTT Broker"
diff --git a/docker/local/Dockerfile b/docker/local/Dockerfile
index 72b73359..475ae687 100644
--- a/docker/local/Dockerfile
+++ b/docker/local/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.14
+FROM alpine:3.18
 
 LABEL maintainer="Roger Light <roger@atchoo.org>" \
     description="Eclipse Mosquitto MQTT Broker"