diff --git a/src/interfaces.ts b/src/interfaces.ts
index c77bc493..e604e636 100644
--- a/src/interfaces.ts
+++ b/src/interfaces.ts
@@ -18,6 +18,7 @@ export interface UpptimeConfig {
     maxResponseTime?: number;
     maxRedirects?: number;
     verbose?: boolean;
+    ipv6?" boolean;
     __dangerous__insecure?: boolean;
     __dangerous__disable_verify_peer?: boolean;
     __dangerous__disable_verify_host?: boolean;