diff --git a/services/node-services/src/handler_api.ts b/services/node-services/src/handler_api.ts
index 250c82cb..75065b24 100644
--- a/services/node-services/src/handler_api.ts
+++ b/services/node-services/src/handler_api.ts
@@ -3,10 +3,10 @@ import * as restate from "@restatedev/restate-sdk";
 export const HandlerAPIEchoTestFQN = "handlerapi.HandlerAPIEchoTest";
 
 // These two handlers just test the correct propagation of the input message in the output
-const echo = (ctx: restate.RpcContext, msg: any) => {
+const echo = (ctx: restate.RpcContext, msg: any): Promise<any> => {
   return msg;
 };
-const echoEcho = async (ctx: restate.RpcContext, msg: any) => {
+const echoEcho = async (ctx: restate.RpcContext, msg: any): Promise<any> => {
   return await ctx.rpc(handlerApi).echo(msg);
 };