diff --git a/docker/1.5/Dockerfile b/docker/1.5/Dockerfile
index 2c9b15c6..0681f4ed 100644
--- a/docker/1.5/Dockerfile
+++ b/docker/1.5/Dockerfile
@@ -3,8 +3,8 @@ FROM alpine:3.8
 LABEL maintainer="Roger Light <roger@atchoo.org>" \
     description="Eclipse Mosquitto MQTT Broker"
 
-ENV VERSION=1.5.5 \
-    DOWNLOAD_SHA256=fcdb47e340864c545146681af7253399cc292e41775afd76400fda5b0d23d668 \
+ENV VERSION=1.5.6 \
+    DOWNLOAD_SHA256=d5bdc13cc668350026376d57fc14de10aaee029f6840707677637d15e0751a40 \
     GPG_KEYS=A0D6EEA1DCAE49A635A3B2F0779B22DFB3E717B7 \
     LWS_VERSION=2.4.2