diff --git a/packages/@uppy/core/types/index.d.ts b/packages/@uppy/core/types/index.d.ts
index 943b1201ad..9428d13289 100644
--- a/packages/@uppy/core/types/index.d.ts
+++ b/packages/@uppy/core/types/index.d.ts
@@ -59,10 +59,10 @@ declare module Uppy {
   }
 
   interface Restrictions {
-    maxFileSize: number | null;
-    maxNumberOfFiles: number | null;
-    minNumberOfFiles: number | null;
-    allowedFileTypes: string[] | null;
+    maxFileSize?: number | null;
+    maxNumberOfFiles?: number | null;
+    minNumberOfFiles?: number | null;
+    allowedFileTypes?: string[] | null;
   }
 
   interface UppyOptions {