diff --git a/speakeasy/index.d.ts b/speakeasy/index.d.ts
index 15ec90c09a..4e281f996f 100644
--- a/speakeasy/index.d.ts
+++ b/speakeasy/index.d.ts
@@ -49,6 +49,7 @@ interface TotpOptions {
     counter?: number;
     epoch?: number;
     secret?: string;
+    digits?: number;
     digest?: () => string;
     algorithm?: string;
 }