diff --git a/types/sequelize/index.d.ts b/types/sequelize/index.d.ts
index 09af63c2ec..d0ed8efc50 100644
--- a/types/sequelize/index.d.ts
+++ b/types/sequelize/index.d.ts
@@ -4046,7 +4046,7 @@ declare namespace sequelize {
          * elements. The first element is always the number of affected rows, while the second element is the actual
          * affected rows (only supported in postgres with `options.returning` true.)
          */
-        update(values: TAttributes, options: UpdateOptions): Promise<[number, TInstance[]]>;
+        update(values: TAttributes, options?: UpdateOptions): Promise<[number, TInstance[]]>;
 
         /**
          * Run a describe query on the table. The result will be return to the listener as a hash of attributes and