diff --git a/ansible-role-elasticsearch/defaults/main.yml b/ansible-role-elasticsearch/defaults/main.yml
index 66ef5659..e87453a4 100644
--- a/ansible-role-elasticsearch/defaults/main.yml
+++ b/ansible-role-elasticsearch/defaults/main.yml
@@ -4,6 +4,6 @@ elasticsearch_node_name: node-1
 elasticsearch_http_port: 9200
 elasticsearch_network_host: 127.0.0.1
 elasticsearch_jvm_xms: null
-elastic_stack_version: 5.6.3
+elastic_stack_version: 5.6.4
 elasticsearch_shards: 5
 elasticsearch_replicas: 1
diff --git a/ansible-role-kibana/defaults/main.yml b/ansible-role-kibana/defaults/main.yml
index f92813ab..9aefda1d 100644
--- a/ansible-role-kibana/defaults/main.yml
+++ b/ansible-role-kibana/defaults/main.yml
@@ -3,4 +3,4 @@ elasticsearch_http_port: "9200"
 elasticsearch_network_host: "127.0.0.1"
 kibana_server_host: "0.0.0.0"
 kibana_server_port: "5601"
-elastic_stack_version: 5.6.3
+elastic_stack_version: 5.6.4
diff --git a/ansible-role-logstash/defaults/main.yml b/ansible-role-logstash/defaults/main.yml
index baddcf5f..09bb4b70 100644
--- a/ansible-role-logstash/defaults/main.yml
+++ b/ansible-role-logstash/defaults/main.yml
@@ -6,7 +6,7 @@ elasticsearch_network_host: "127.0.0.1"
 elasticsearch_http_port: "9200"
 elasticsearch_shards: 5
 elasticsearch_replicas: 1
-elastic_stack_version: 5.6.3
+elastic_stack_version: 5.6.4
 
 logstash_ssl: false
 logstash_ssl_dir: /etc/pki/logstash