diff --git a/x-pack/plugins/monitoring/server/lib/apm/get_apm_info.js b/x-pack/plugins/monitoring/server/lib/apm/get_apm_info.js
index 0b2e833933177e..ea37ff7783ad70 100644
--- a/x-pack/plugins/monitoring/server/lib/apm/get_apm_info.js
+++ b/x-pack/plugins/monitoring/server/lib/apm/get_apm_info.js
@@ -86,7 +86,7 @@ export async function getApmInfo(req, apmIndexPattern, { clusterUuid, apmUuid, s
         inner_hits: {
           name: 'first_hit',
           size: 1,
-          sort: { 'beats_stats.timestamp': 'asc' },
+          sort: { 'beats_stats.timestamp': { order: 'asc', unmapped_type: 'long' } },
         },
       },
     },
diff --git a/x-pack/plugins/monitoring/server/lib/apm/get_apms.js b/x-pack/plugins/monitoring/server/lib/apm/get_apms.js
index 03a395e87d860c..2d59bfea72eb2b 100644
--- a/x-pack/plugins/monitoring/server/lib/apm/get_apms.js
+++ b/x-pack/plugins/monitoring/server/lib/apm/get_apms.js
@@ -124,7 +124,7 @@ export async function getApms(req, apmIndexPattern, clusterUuid) {
         inner_hits: {
           name: 'earliest',
           size: 1,
-          sort: [{ 'beats_stats.timestamp': 'asc' }],
+          sort: [{ 'beats_stats.timestamp': { order: 'asc', unmapped_type: 'long' } }],
         },
       },
       sort: [
diff --git a/x-pack/plugins/monitoring/server/lib/beats/get_beat_summary.js b/x-pack/plugins/monitoring/server/lib/beats/get_beat_summary.js
index 962018f88354d0..5d6c38e19bef2a 100644
--- a/x-pack/plugins/monitoring/server/lib/beats/get_beat_summary.js
+++ b/x-pack/plugins/monitoring/server/lib/beats/get_beat_summary.js
@@ -90,7 +90,7 @@ export async function getBeatSummary(
         inner_hits: {
           name: 'first_hit',
           size: 1,
-          sort: { 'beats_stats.timestamp': 'asc' },
+          sort: { 'beats_stats.timestamp': { order: 'asc', unmapped_type: 'long' } },
         },
       },
     },
diff --git a/x-pack/plugins/monitoring/server/routes/api/v1/elasticsearch/ccr.js b/x-pack/plugins/monitoring/server/routes/api/v1/elasticsearch/ccr.js
index fbaac56aa7400f..9f69ea1465c2db 100644
--- a/x-pack/plugins/monitoring/server/routes/api/v1/elasticsearch/ccr.js
+++ b/x-pack/plugins/monitoring/server/routes/api/v1/elasticsearch/ccr.js
@@ -126,7 +126,7 @@ function buildRequest(req, config, esIndexPattern) {
         field: 'ccr_stats.follower_index',
         inner_hits: {
           name: 'by_shard',
-          sort: [{ timestamp: 'desc' }],
+          sort: [{ timestamp: { order: 'desc', unmapped_type: 'long' } }],
           size: maxBucketSize,
           collapse: {
             field: 'ccr_stats.shard_id',
diff --git a/x-pack/plugins/monitoring/server/routes/api/v1/elasticsearch/ccr_shard.js b/x-pack/plugins/monitoring/server/routes/api/v1/elasticsearch/ccr_shard.js
index 0a4b60b1732540..92458a31c6bd8c 100644
--- a/x-pack/plugins/monitoring/server/routes/api/v1/elasticsearch/ccr_shard.js
+++ b/x-pack/plugins/monitoring/server/routes/api/v1/elasticsearch/ccr_shard.js
@@ -59,7 +59,7 @@ async function getCcrStat(req, esIndexPattern, filters) {
         inner_hits: {
           name: 'oldest',
           size: 1,
-          sort: [{ timestamp: 'asc' }],
+          sort: [{ timestamp: { order: 'asc', unmapped_type: 'long' } }],
         },
       },
     },