diff --git a/kafka/cluster/docker-compose-zookeeper1.yml b/kafka/cluster/docker-compose-zookeeper1.yml
index e03dba1..990e250 100644
--- a/kafka/cluster/docker-compose-zookeeper1.yml
+++ b/kafka/cluster/docker-compose-zookeeper1.yml
@@ -1,5 +1,5 @@
 zookeeper:
-  image: zookeeper
+  image: zookeeper:3.5.5
   ports:
     - "2181:2181"
     - "2888:2888"
@@ -10,7 +10,7 @@ zookeeper:
     - /data/zookeeper/datalog:/datalog
   environment:
     - ZOO_MY_ID=1
-    - ZOO_SERVERS=server.1=0.0.0.0:2888:3888 server.2=zookeeper2:2888:3888 server.3=zookeeper3:2888:3888
+    - ZOO_SERVERS=server.1=0.0.0.0:2888:3888;2181 server.2=zookeeper2:2888:3888;2181 server.3=zookeeper3:2888:3888;2181
   extra_hosts:
     - zookeeper1:10.0.0.21
     - zookeeper2:10.0.0.22