diff --git a/src/datasource-zabbix/datasource.js b/src/datasource-zabbix/datasource.js
index faeda51..dbb1241 100644
--- a/src/datasource-zabbix/datasource.js
+++ b/src/datasource-zabbix/datasource.js
@@ -337,8 +337,8 @@ export class ZabbixAPIDatasource {
   /////////////////
 
   annotationQuery(options) {
-    var from = Math.ceil(dateMath.parse(options.rangeRaw.from) / 1000);
-    var to = Math.ceil(dateMath.parse(options.rangeRaw.to) / 1000);
+    var timeFrom = Math.ceil(dateMath.parse(options.rangeRaw.from) / 1000);
+    var timeTo = Math.ceil(dateMath.parse(options.rangeRaw.to) / 1000);
     var annotation = options.annotation;
     var self = this;
     var showOkEvents = annotation.showOkEvents ? [0, 1] : 1;
@@ -353,7 +353,8 @@ export class ZabbixAPIDatasource {
       return self.zabbixAPI.getTriggers(query.groupids,
                                         query.hostids,
                                         query.applicationids,
-                                        showTriggers)
+                                        showTriggers,
+                                        timeFrom, timeTo)
         .then(function(triggers) {
 
           // Filter triggers by description
@@ -373,7 +374,7 @@ export class ZabbixAPIDatasource {
           });
 
           var objectids = _.map(triggers, 'triggerid');
-          return self.zabbixAPI.getEvents(objectids, from, to, showOkEvents)
+          return self.zabbixAPI.getEvents(objectids, timeFrom, timeTo, showOkEvents)
             .then(function (events) {
               var indexedTriggers = _.indexBy(triggers, 'triggerid');
 
diff --git a/src/datasource-zabbix/migrations.js b/src/datasource-zabbix/migrations.js
index 0bbd737..9429211 100644
--- a/src/datasource-zabbix/migrations.js
+++ b/src/datasource-zabbix/migrations.js
@@ -34,5 +34,9 @@ export function migrate(target) {
 }
 
 function convertToRegex(str) {
-  return '/' + str + '/';
+  if (str) {
+    return '/' + str + '/';
+  } else {
+    return '/.*/';
+  }
 }
diff --git a/src/datasource-zabbix/zabbixAPI.service.js b/src/datasource-zabbix/zabbixAPI.service.js
index beb4eec..e85045b 100644
--- a/src/datasource-zabbix/zabbixAPI.service.js
+++ b/src/datasource-zabbix/zabbixAPI.service.js
@@ -298,7 +298,7 @@ function ZabbixAPIService($q, alertSrv, zabbixAPICoreService) {
       return this.request('service.getsla', params);
     }
 
-    getTriggers(groupids, hostids, applicationids, showTriggers) {
+    getTriggers(groupids, hostids, applicationids, showTriggers, timeFrom, timeTo) {
       var params = {
         output: 'extend',
         groupids: groupids,
@@ -322,6 +322,11 @@ function ZabbixAPIService($q, alertSrv, zabbixAPICoreService) {
         params.filter.value = showTriggers;
       }
 
+      if (timeFrom || timeTo) {
+        params.lastChangeSince = timeFrom;
+        params.lastChangeTill = timeTo;
+      }
+
       return this.request('trigger.get', params);
     }