diff --git a/index.d.ts b/index.d.ts
index a3e2ee0..d2402ca 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -110,7 +110,7 @@ declare module 'replicate' {
 
     wait(
       prediction: Prediction,
-      options: {
+      options?: {
         interval?: number;
       },
       stop?: (prediction: Prediction) => Promise<boolean>