diff --git a/packages/opentelemetry-exporter-prometheus/package.json b/packages/opentelemetry-exporter-prometheus/package.json
index 25470d4c28..cc7b480e1a 100644
--- a/packages/opentelemetry-exporter-prometheus/package.json
+++ b/packages/opentelemetry-exporter-prometheus/package.json
@@ -55,6 +55,6 @@
     "@opentelemetry/api": "^0.8.3",
     "@opentelemetry/core": "^0.8.3",
     "@opentelemetry/metrics": "^0.8.3",
-    "prom-client": "^11.5.3"
+    "prom-client": "^12.0.0"
   }
 }
diff --git a/packages/opentelemetry-exporter-prometheus/src/prometheus.ts b/packages/opentelemetry-exporter-prometheus/src/prometheus.ts
index 84c2fed821..0e00b1651b 100644
--- a/packages/opentelemetry-exporter-prometheus/src/prometheus.ts
+++ b/packages/opentelemetry-exporter-prometheus/src/prometheus.ts
@@ -14,11 +14,7 @@
  * limitations under the License.
  */
 
-import {
-  ExportResult,
-  NoopLogger,
-  hrTimeToMilliseconds,
-} from '@opentelemetry/core';
+import { ExportResult, NoopLogger } from '@opentelemetry/core';
 import {
   CounterSumAggregator,
   LastValue,
@@ -31,7 +27,7 @@ import {
 } from '@opentelemetry/metrics';
 import * as api from '@opentelemetry/api';
 import { createServer, IncomingMessage, Server, ServerResponse } from 'http';
-import { Counter, Gauge, labelValues, Metric, Registry } from 'prom-client';
+import { Counter, Gauge, LabelValues, Metric, Registry } from 'prom-client';
 import * as url from 'url';
 import { ExporterConfig } from './export/types';
 
@@ -140,7 +136,6 @@ export class PrometheusExporter implements MetricExporter {
       metric.inc(
         labelValues,
         point.value as Sum,
-        hrTimeToMilliseconds(point.timestamp)
       );
     }
 
@@ -151,7 +146,6 @@ export class PrometheusExporter implements MetricExporter {
         metric.set(
           labelValues,
           point.value as LastValue,
-          hrTimeToMilliseconds(point.timestamp)
         );
       }
     }
@@ -160,7 +154,7 @@ export class PrometheusExporter implements MetricExporter {
   }
 
   private _getLabelValues(keys: string[], labels: api.Labels) {
-    const labelValues: labelValues = {};
+    const labelValues: LabelValues<string> = {};
     for (let i = 0; i < keys.length; i++) {
       if (labels[keys[i]] !== null) {
         labelValues[keys[i]] = labels[keys[i]];