diff --git a/examples/basic-auth-proxy/worker.mjs b/examples/basic-auth-proxy/worker.mjs
index 1724f16..06ac27d 100644
--- a/examples/basic-auth-proxy/worker.mjs
+++ b/examples/basic-auth-proxy/worker.mjs
@@ -9,9 +9,14 @@ const load = WebAssembly.instantiate(mod, go.importObject).then((instance) => {
   return instance;
 });
 
+const readyPromise = new Promise((resolve) => {
+  globalThis.ready = resolve;
+});
+
 async function processRequest(event) {
   const req = event.request;
   await load;
+  await readyPromise;
   return handleRequest(req);
 }
 
diff --git a/examples/env/worker.mjs b/examples/env/worker.mjs
index 1724f16..06ac27d 100644
--- a/examples/env/worker.mjs
+++ b/examples/env/worker.mjs
@@ -9,9 +9,14 @@ const load = WebAssembly.instantiate(mod, go.importObject).then((instance) => {
   return instance;
 });
 
+const readyPromise = new Promise((resolve) => {
+  globalThis.ready = resolve;
+});
+
 async function processRequest(event) {
   const req = event.request;
   await load;
+  await readyPromise;
   return handleRequest(req);
 }
 
diff --git a/examples/hello/worker.mjs b/examples/hello/worker.mjs
index 1724f16..06ac27d 100644
--- a/examples/hello/worker.mjs
+++ b/examples/hello/worker.mjs
@@ -9,9 +9,14 @@ const load = WebAssembly.instantiate(mod, go.importObject).then((instance) => {
   return instance;
 });
 
+const readyPromise = new Promise((resolve) => {
+  globalThis.ready = resolve;
+});
+
 async function processRequest(event) {
   const req = event.request;
   await load;
+  await readyPromise;
   return handleRequest(req);
 }
 
diff --git a/examples/kv-counter/worker.mjs b/examples/kv-counter/worker.mjs
index 1724f16..06ac27d 100644
--- a/examples/kv-counter/worker.mjs
+++ b/examples/kv-counter/worker.mjs
@@ -9,9 +9,14 @@ const load = WebAssembly.instantiate(mod, go.importObject).then((instance) => {
   return instance;
 });
 
+const readyPromise = new Promise((resolve) => {
+  globalThis.ready = resolve;
+});
+
 async function processRequest(event) {
   const req = event.request;
   await load;
+  await readyPromise;
   return handleRequest(req);
 }
 
diff --git a/examples/r2-image-server/worker.mjs b/examples/r2-image-server/worker.mjs
index 1724f16..06ac27d 100644
--- a/examples/r2-image-server/worker.mjs
+++ b/examples/r2-image-server/worker.mjs
@@ -9,9 +9,14 @@ const load = WebAssembly.instantiate(mod, go.importObject).then((instance) => {
   return instance;
 });
 
+const readyPromise = new Promise((resolve) => {
+  globalThis.ready = resolve;
+});
+
 async function processRequest(event) {
   const req = event.request;
   await load;
+  await readyPromise;
   return handleRequest(req);
 }
 
diff --git a/examples/r2-image-viewer/worker.mjs b/examples/r2-image-viewer/worker.mjs
index 1724f16..06ac27d 100644
--- a/examples/r2-image-viewer/worker.mjs
+++ b/examples/r2-image-viewer/worker.mjs
@@ -9,9 +9,14 @@ const load = WebAssembly.instantiate(mod, go.importObject).then((instance) => {
   return instance;
 });
 
+const readyPromise = new Promise((resolve) => {
+  globalThis.ready = resolve;
+});
+
 async function processRequest(event) {
   const req = event.request;
   await load;
+  await readyPromise;
   return handleRequest(req);
 }
 
diff --git a/examples/simple-json-server/worker.mjs b/examples/simple-json-server/worker.mjs
index 1724f16..06ac27d 100644
--- a/examples/simple-json-server/worker.mjs
+++ b/examples/simple-json-server/worker.mjs
@@ -9,9 +9,14 @@ const load = WebAssembly.instantiate(mod, go.importObject).then((instance) => {
   return instance;
 });
 
+const readyPromise = new Promise((resolve) => {
+  globalThis.ready = resolve;
+});
+
 async function processRequest(event) {
   const req = event.request;
   await load;
+  await readyPromise;
   return handleRequest(req);
 }
 
diff --git a/handler.go b/handler.go
index ec28017..4612961 100644
--- a/handler.go
+++ b/handler.go
@@ -67,5 +67,6 @@ func Serve(handler http.Handler) {
 		handler = http.DefaultServeMux
 	}
 	httpHandler = handler
+	jsutil.Global.Call("ready")
 	select {}
 }