diff --git a/x-pack/plugins/endpoint/scripts/alert_mapping.json b/x-pack/plugins/endpoint/scripts/alert_mapping.json
index a21e48b4bc95f..2e0041d0af986 100644
--- a/x-pack/plugins/endpoint/scripts/alert_mapping.json
+++ b/x-pack/plugins/endpoint/scripts/alert_mapping.json
@@ -394,7 +394,8 @@
                 "type": "nested"
               },
               "file_extension": {
-                "type": "long"
+                "ignore_above": 1024,
+                "type": "keyword"
               },
               "project_file": {
                 "properties": {
diff --git a/x-pack/plugins/endpoint/scripts/event_mapping.json b/x-pack/plugins/endpoint/scripts/event_mapping.json
index 59d1ed17852b1..f410edc7abe5e 100644
--- a/x-pack/plugins/endpoint/scripts/event_mapping.json
+++ b/x-pack/plugins/endpoint/scripts/event_mapping.json
@@ -386,7 +386,8 @@
                 "type": "nested"
               },
               "file_extension": {
-                "type": "long"
+                "ignore_above": 1024,
+                "type": "keyword"
               },
               "project_file": {
                 "properties": {