diff --git a/docker/Mosquitto/Dockerfile b/docker/Mosquitto/Dockerfile
index ef43aa9ac..1e394b006 100644
--- a/docker/Mosquitto/Dockerfile
+++ b/docker/Mosquitto/Dockerfile
@@ -1,4 +1,4 @@
-ARG  IMAGE_TAG=12.5-slim
+ARG  IMAGE_TAG=12.6-slim
 FROM debian:${IMAGE_TAG}
 
 ARG CLEAN_DEV_TOOLS