diff --git a/x-pack/filebeat/filebeat.reference.yml b/x-pack/filebeat/filebeat.reference.yml
index 2bbbe8711fd..b32717a9e2b 100644
--- a/x-pack/filebeat/filebeat.reference.yml
+++ b/x-pack/filebeat/filebeat.reference.yml
@@ -92,6 +92,9 @@ filebeat.modules:
     # Filebeat will choose the paths depending on your OS.
     #var.paths:
 
+    # Convert the timestamp to UTC. Requires Elasticsearch >= 6.1.
+    #var.convert_timezone: false
+
   gc:
     enabled: true
     # Set custom paths for the log files. If left empty,
@@ -104,18 +107,28 @@ filebeat.modules:
     # Filebeat will choose the paths depending on your OS.
     #var.paths:
 
+    # Convert the timestamp to UTC. Requires Elasticsearch >= 6.1.
+    #var.convert_timezone: false
+
   slowlog:
     enabled: true
     # Set custom paths for the log files. If left empty,
     # Filebeat will choose the paths depending on your OS.
     #var.paths:
 
+    # Convert the timestamp to UTC. Requires Elasticsearch >= 6.1.
+    #var.convert_timezone: false
+
   deprecation:
     enabled: true
     # Set custom paths for the log files. If left empty,
     # Filebeat will choose the paths depending on your OS.
     #var.paths:
 
+    # Convert the timestamp to UTC. Requires Elasticsearch >= 6.1.
+    #var.convert_timezone: false
+
+
 #------------------------------- Haproxy Module -------------------------------
 - module: haproxy
   # All logs