diff --git a/rethinkdb/index.d.ts b/rethinkdb/index.d.ts
index b07a4e27c6..f375a50fc7 100644
--- a/rethinkdb/index.d.ts
+++ b/rethinkdb/index.d.ts
@@ -310,9 +310,9 @@ declare module "rethinkdb" {
     }
 
     interface UpdateOptions {
-        non_atomic: boolean;
-        durability: string; // 'soft'
-        return_vals: boolean; // false
+        nonAtomic?: boolean;
+        durability?: 'hard' | 'soft';
+        returnChanges?: boolean;
     }
 
     interface WriteResult {