diff --git a/src/datasource-zabbix/constants.js b/src/datasource-zabbix/constants.js
index b52a6866c..3c8de5114 100644
--- a/src/datasource-zabbix/constants.js
+++ b/src/datasource-zabbix/constants.js
@@ -1,3 +1,7 @@
+// Data point
+export const DATAPOINT_VALUE = 0;
+export const DATAPOINT_TS = 1;
+
 // Editor modes
 export const MODE_METRICS = 0;
 export const MODE_ITSERVICE = 1;
@@ -17,9 +21,10 @@ export const SHOW_ALL_TRIGGERS = [0, 1];
 export const SHOW_ALL_EVENTS = [0, 1];
 export const SHOW_OK_EVENTS = 1;
 
-// Data point
-export const DATAPOINT_VALUE = 0;
-export const DATAPOINT_TS = 1;
+// Acknowledge
+export const ZBX_ACK_ACTION_NONE = 0;
+export const ZBX_ACK_ACTION_ACK = 2;
+export const ZBX_ACK_ACTION_ADD_MESSAGE = 4;
 
 export const TRIGGER_SEVERITY = [
   {val: 0, text: 'Not classified'},
diff --git a/src/datasource-zabbix/zabbix/connectors/zabbix_api/zabbixAPIConnector.js b/src/datasource-zabbix/zabbix/connectors/zabbix_api/zabbixAPIConnector.js
index e6abf7815..343266946 100644
--- a/src/datasource-zabbix/zabbix/connectors/zabbix_api/zabbixAPIConnector.js
+++ b/src/datasource-zabbix/zabbix/connectors/zabbix_api/zabbixAPIConnector.js
@@ -1,6 +1,7 @@
 import _ from 'lodash';
 import * as utils from '../../../utils';
 import { ZabbixAPICore } from './zabbixAPICore';
+import { ZBX_ACK_ACTION_NONE, ZBX_ACK_ACTION_ACK, ZBX_ACK_ACTION_ADD_MESSAGE } from '../../../constants';
 
 /**
  * Zabbix API Wrapper.
@@ -8,11 +9,12 @@ import { ZabbixAPICore } from './zabbixAPICore';
  * Wraps API calls and provides high-level methods.
  */
 export class ZabbixAPIConnector {
-  constructor(api_url, username, password, basicAuth, withCredentials, backendSrv) {
+  constructor(api_url, username, password, version, basicAuth, withCredentials, backendSrv) {
     this.url              = api_url;
     this.username         = username;
     this.password         = password;
-    this.auth             = "";
+    this.auth             = '';
+    this.version          = version;
 
     this.requestOptions = {
       basicAuth: basicAuth,
@@ -90,10 +92,11 @@ export class ZabbixAPIConnector {
   ////////////////////////////////
 
   acknowledgeEvent(eventid, message) {
-    var params = {
+    const action = this.version >= 4 ? ZBX_ACK_ACTION_ACK + ZBX_ACK_ACTION_ADD_MESSAGE : ZBX_ACK_ACTION_NONE;
+    const params = {
       eventids: eventid,
       message: message,
-      action: 6
+      action: action
     };
 
     return this.request('event.acknowledge', params);
diff --git a/src/datasource-zabbix/zabbix/zabbix.js b/src/datasource-zabbix/zabbix/zabbix.js
index a1c300bdf..6badc491f 100644
--- a/src/datasource-zabbix/zabbix/zabbix.js
+++ b/src/datasource-zabbix/zabbix/zabbix.js
@@ -28,6 +28,7 @@ export class Zabbix {
       password,
       basicAuth,
       withCredentials,
+      zabbixVersion,
       cacheTTL,
       enableDirectDBConnection,
       dbConnectionDatasourceId,
@@ -43,7 +44,7 @@ export class Zabbix {
     };
     this.cachingProxy = new CachingProxy(cacheOptions);
 
-    this.zabbixAPI = new ZabbixAPIConnector(url, username, password, basicAuth, withCredentials, backendSrv);
+    this.zabbixAPI = new ZabbixAPIConnector(url, username, password, zabbixVersion, basicAuth, withCredentials, backendSrv);
 
     if (enableDirectDBConnection) {
       let dbConnectorOptions = {