diff --git a/docs/es-overview.asciidoc b/docs/es-overview.asciidoc
index 2abc8b3384..457ca188bc 100644
--- a/docs/es-overview.asciidoc
+++ b/docs/es-overview.asciidoc
@@ -3,7 +3,7 @@
 = Elastic Security overview
 
 Elastic Security combines SIEM threat detection features with endpoint
-prevention and response capabilities in one solution. These analytical and
+prevention and response capabilities in a single solution. These analytical and
 protection capabilities, leveraged by the speed and extensibility of
 Elasticsearch, enable analysts to defend their organization from threats before
 damage and loss occur.