diff --git a/docker/1.4.12/Dockerfile b/docker/1.4.12/Dockerfile
index be20a14f..a8ab47d0 100644
--- a/docker/1.4.12/Dockerfile
+++ b/docker/1.4.12/Dockerfile
@@ -9,5 +9,6 @@ RUN apk --no-cache add mosquitto=1.4.12-r0 && \
     chown -R mosquitto:mosquitto /mosquitto
 
 COPY docker-entrypoint.sh /
+EXPOSE 1883
 ENTRYPOINT ["/docker-entrypoint.sh"]
 CMD ["/usr/sbin/mosquitto", "-c", "/mosquitto/config/mosquitto.conf"]
diff --git a/docker/1.5/Dockerfile b/docker/1.5/Dockerfile
index 83dee964..28beacad 100644
--- a/docker/1.5/Dockerfile
+++ b/docker/1.5/Dockerfile
@@ -83,5 +83,6 @@ VOLUME ["/mosquitto/data", "/mosquitto/log"]
 
 # Set up the entry point script and default command
 COPY docker-entrypoint.sh /
+EXPOSE 1883
 ENTRYPOINT ["/docker-entrypoint.sh"]
 CMD ["/usr/sbin/mosquitto", "-c", "/mosquitto/config/mosquitto.conf"]
diff --git a/docker/1.6/Dockerfile b/docker/1.6/Dockerfile
index 39baa657..0a5c8b5c 100644
--- a/docker/1.6/Dockerfile
+++ b/docker/1.6/Dockerfile
@@ -85,5 +85,6 @@ VOLUME ["/mosquitto/data", "/mosquitto/log"]
 
 # Set up the entry point script and default command
 COPY docker-entrypoint.sh /
+EXPOSE 1883
 ENTRYPOINT ["/docker-entrypoint.sh"]
 CMD ["/usr/sbin/mosquitto", "-c", "/mosquitto/config/mosquitto.conf"]
diff --git a/docker/generic/Dockerfile b/docker/generic/Dockerfile
index 51c1d181..01f8d266 100644
--- a/docker/generic/Dockerfile
+++ b/docker/generic/Dockerfile
@@ -66,5 +66,6 @@ VOLUME ["/mosquitto/config", "/mosquitto/data", "/mosquitto/log"]
 
 # Set up the entry point script and default command
 COPY docker-entrypoint.sh /
+EXPOSE 1883
 ENTRYPOINT ["/docker-entrypoint.sh"]
 CMD ["/usr/sbin/mosquitto", "-c", "/mosquitto/config/mosquitto.conf"]
diff --git a/docker/local/Dockerfile b/docker/local/Dockerfile
index 06527a69..1d7517ab 100644
--- a/docker/local/Dockerfile
+++ b/docker/local/Dockerfile
@@ -66,5 +66,6 @@ VOLUME ["/mosquitto/data", "/mosquitto/log"]
 
 # Set up the entry point script and default command
 COPY docker-entrypoint.sh /
+EXPOSE 1883
 ENTRYPOINT ["/docker-entrypoint.sh"]
 CMD ["/usr/sbin/mosquitto", "-c", "/mosquitto/config/mosquitto.conf"]