diff --git a/datasource.js b/datasource.js
index 831c010..e20af50 100644
--- a/datasource.js
+++ b/datasource.js
@@ -463,7 +463,7 @@ function (angular, _, moment, sdk, dateMath, kbn) {
       var period = regex[0].substring('period='.length);
       var matches = period.match(kbn.interval_regex);
       if (matches) {
-        period = kbn.interval_to_seconds(period);
+        period = kbn.intervalToSeconds(period);
         target = target.replace(regex, 'period='+period);
       }
     }
diff --git a/plugin.json b/plugin.json
index f504a6d..74084b3 100644
--- a/plugin.json
+++ b/plugin.json
@@ -26,12 +26,12 @@
       {"name": "GitHub", "url": "https://github.com/openstack/monasca-grafana-datasource"},
       {"name": "License", "url": "https://github.com/openstack/monasca-grafana-datasource/LICENSE"}
     ],
-    "version": "1.3.0",
-    "updated": "2017-10-23"
+    "version": "1.4.0",
+    "updated": "2021-03-09"
   },
 
   "dependencies": {
-    "grafanaVersion": "3.x.x",
+    "grafanaVersion": "7.x.x",
     "plugins": [ ]
   }
 }