diff --git a/public/app/plugins/datasource/prometheus/datasource.js b/public/app/plugins/datasource/prometheus/datasource.js
index 3f62279f6c9..64756f4c49e 100644
--- a/public/app/plugins/datasource/prometheus/datasource.js
+++ b/public/app/plugins/datasource/prometheus/datasource.js
@@ -148,20 +148,13 @@ function (angular, _, moment, dateMath) {
             });
           });
         } else {
-          var metric_query = 'count(' + label_values_query[1] + ') by (' +
-                             label_values_query[2]  + ')';
-          url = '/api/v1/query?query=' + encodeURIComponent(metric_query) +
-                    '&time=' + (moment().valueOf() / 1000);
+          url = '/api/v1/series?match[]=' + encodeURIComponent(label_values_query[1]);
 
           return this._request('GET', url)
             .then(function(result) {
-              if (result.data.data.result.length === 0 ||
-                  _.keys(result.data.data.result[0].metric).length === 0) {
-                return [];
-              }
-              return _.map(result.data.data.result, function(metricValue) {
+              return _.map(result.data.data, function(metric) {
                 return {
-                  text: metricValue.metric[label_values_query[2]],
+                  text: metric[label_values_query[2]],
                   expandable: true
                 };
               });
@@ -190,14 +183,13 @@ function (angular, _, moment, dateMath) {
           });
       } else {
         // if query contains full metric name, return metric name and label list
-        url = '/api/v1/query?query=' + encodeURIComponent(interpolated) +
-              '&time=' + (moment().valueOf() / 1000);
+        url = '/api/v1/series?match[]=' + encodeURIComponent(interpolated);
 
         return this._request('GET', url)
           .then(function(result) {
-            return _.map(result.data.data.result, function(metricData) {
+            return _.map(result.data.data, function(metric) {
               return {
-                text: getOriginalMetricName(metricData.metric),
+                text: getOriginalMetricName(metric),
                 expandable: true
               };
             });
diff --git a/public/app/plugins/datasource/prometheus/specs/datasource_specs.ts b/public/app/plugins/datasource/prometheus/specs/datasource_specs.ts
index fc43da279fc..a6b494ccbf8 100644
--- a/public/app/plugins/datasource/prometheus/specs/datasource_specs.ts
+++ b/public/app/plugins/datasource/prometheus/specs/datasource_specs.ts
@@ -59,19 +59,16 @@ describe('PrometheusDatasource', function() {
       ctx.$rootScope.$apply();
       expect(results.length).to.be(3);
     });
-    it('label_values(metric, resource) should generate count metric query', function() {
+    it('label_values(metric, resource) should generate series query', function() {
       response = {
         status: "success",
-        data: {
-          resultType: "vector",
-          result: [
-            {metric: {resource: "value1"}, value: []},
-            {metric: {resource: "value2"}, value: []},
-            {metric: {resource: "value3"}, value: []}
-          ]
-        }
+        data: [
+          {__name__: "metric", resource: "value1"},
+          {__name__: "metric", resource: "value2"},
+          {__name__: "metric", resource: "value3"}
+        ]
       };
-      ctx.$httpBackend.expect('GET', /proxied\/api\/v1\/query\?query=count\(metric\)%20by%20\(resource\)&time=.*/).respond(response);
+      ctx.$httpBackend.expect('GET', 'proxied/api/v1/series?match[]=metric').respond(response);
       ctx.ds.metricFindQuery('label_values(metric, resource)').then(function(data) { results = data; });
       ctx.$httpBackend.flush();
       ctx.$rootScope.$apply();
@@ -90,4 +87,3 @@ describe('PrometheusDatasource', function() {
     });
   });
 });
-