diff --git a/docs/en/apm-server/api-events.asciidoc b/docs/en/apm-server/api-events.asciidoc
index 8ebd478e89..1eeb032024 100644
--- a/docs/en/apm-server/api-events.asciidoc
+++ b/docs/en/apm-server/api-events.asciidoc
@@ -13,7 +13,7 @@ Events can be:
 * Metrics
 
 Each event is sent as its own line in the HTTP request body.
-This is known as http://ndjson.org[newline delimited JSON (NDJSON)].
+This is known as https://github.com/ndjson/ndjson-spec[newline delimited JSON (NDJSON)].
 
 With NDJSON, agents can open an HTTP POST request and use chunked encoding to stream events to the APM Server
 as soon as they are recorded in the agent.