diff --git a/x-pack/plugins/alerting/server/config.ts b/x-pack/plugins/alerting/server/config.ts
index b6ff8d09779dc..c07d5bbf0f3f2 100644
--- a/x-pack/plugins/alerting/server/config.ts
+++ b/x-pack/plugins/alerting/server/config.ts
@@ -16,7 +16,7 @@ const ruleTypeSchema = schema.object({
 
 const connectorTypeSchema = schema.object({
   id: schema.string(),
-  max: schema.maybe(schema.number()),
+  max: schema.maybe(schema.number({ max: 100000 })),
 });
 
 const rulesSchema = schema.object({