diff --git a/x-pack/plugins/uptime/common/runtime_types/ping/ping.ts b/x-pack/plugins/uptime/common/runtime_types/ping/ping.ts
index 315b8f543b800e..a9f0e373ef29a5 100644
--- a/x-pack/plugins/uptime/common/runtime_types/ping/ping.ts
+++ b/x-pack/plugins/uptime/common/runtime_types/ping/ping.ts
@@ -85,6 +85,10 @@ export const MonitorType = t.intersection([
 
 export type Monitor = t.TypeOf<typeof MonitorType>;
 
+export const PingHeadersType = t.record(t.string, t.union([t.string, t.array(t.string)]));
+
+export type PingHeaders = t.TypeOf<typeof PingHeadersType>;
+
 export const PingType = t.intersection([
   t.type({
     timestamp: t.string,
@@ -145,7 +149,7 @@ export const PingType = t.intersection([
         bytes: t.number,
         redirects: t.array(t.string),
         status_code: t.number,
-        headers: t.record(t.string, t.string),
+        headers: PingHeadersType,
       }),
       version: t.string,
     }),
diff --git a/x-pack/plugins/uptime/public/components/monitor/ping_list/headers.tsx b/x-pack/plugins/uptime/public/components/monitor/ping_list/headers.tsx
index 52fe26a7e08ca0..a8cd8e2a26f981 100644
--- a/x-pack/plugins/uptime/public/components/monitor/ping_list/headers.tsx
+++ b/x-pack/plugins/uptime/public/components/monitor/ping_list/headers.tsx
@@ -7,9 +7,10 @@
 import React from 'react';
 import { EuiAccordion, EuiDescriptionList, EuiSpacer, EuiText } from '@elastic/eui';
 import { i18n } from '@kbn/i18n';
+import { PingHeaders as HeadersProp } from '../../../../common/runtime_types';
 
 interface Props {
-  headers: Record<string, string>;
+  headers: HeadersProp;
 }
 
 export const PingHeaders = ({ headers }: Props) => {