diff --git a/src/index.d.ts b/src/index.d.ts
index b9a3507..ac62d8f 100644
--- a/src/index.d.ts
+++ b/src/index.d.ts
@@ -7,6 +7,8 @@ declare namespace NodeBle {
         isNotifying(): Promise<boolean>;
         readValue(offset?: number): Promise<Buffer>;
         writeValue(buffer: Buffer, optionsOrOffset?: number | WriteValueOptions): Promise<void>;
+        writeValueWithoutResponse(buffer: Buffer, offset?: number): Promise<void>;
+        writeValueWithResponse(buffer: Buffer, offset? number): Promise<void>;
         startNotifications(): Promise<void>;
         stopNotifications(): Promise<void>;
         toString(): Promise<string>;