diff --git a/_examples/node-ts/server-fastify/server.gen.ts b/_examples/node-ts/server-fastify/server.gen.ts
index d84b52d..bbb24b5 100644
--- a/_examples/node-ts/server-fastify/server.gen.ts
+++ b/_examples/node-ts/server-fastify/server.gen.ts
@@ -1,7 +1,7 @@
 /* eslint-disable */
 // node-ts v1.0.0 21701cae51b73d035bf2180831cdb38220bbbccc
 // --
-// Code generated by Webrpc-gen@v0.30.3 with ../../../gen-typescript generator. DO NOT EDIT.
+// Code generated by Webrpc-gen@v0.30.4 with ../../../gen-typescript generator. DO NOT EDIT.
 //
 // webrpc-gen -schema=service.ridl -target=../../../gen-typescript -server -out=./server-fastify/server.gen.ts
 
@@ -555,7 +555,7 @@ export const webrpcErrorByCode: { [code: number]: any } = {
 
 export const WebrpcHeader = "Webrpc"
 
-export const WebrpcHeaderValue = "webrpc@v0.30.3;gen-typescript@unknown;node-ts@v1.0.0"
+export const WebrpcHeaderValue = "webrpc@v0.30.4;gen-typescript@unknown;node-ts@v1.0.0"
 
 type WebrpcGenVersions = {
   WebrpcGenVersion: string;
diff --git a/_examples/node-ts/server-hono/server.gen.ts b/_examples/node-ts/server-hono/server.gen.ts
index 9e4ef5d..3a50951 100644
--- a/_examples/node-ts/server-hono/server.gen.ts
+++ b/_examples/node-ts/server-hono/server.gen.ts
@@ -1,7 +1,7 @@
 /* eslint-disable */
 // node-ts v1.0.0 21701cae51b73d035bf2180831cdb38220bbbccc
 // --
-// Code generated by Webrpc-gen@v0.30.3 with ../../../gen-typescript generator. DO NOT EDIT.
+// Code generated by Webrpc-gen@v0.30.4 with ../../../gen-typescript generator. DO NOT EDIT.
 //
 // webrpc-gen -schema=service.ridl -target=../../../gen-typescript -server -out=./server-hono/server.gen.ts
 
@@ -555,7 +555,7 @@ export const webrpcErrorByCode: { [code: number]: any } = {
 
 export const WebrpcHeader = "Webrpc"
 
-export const WebrpcHeaderValue = "webrpc@v0.30.3;gen-typescript@unknown;node-ts@v1.0.0"
+export const WebrpcHeaderValue = "webrpc@v0.30.4;gen-typescript@unknown;node-ts@v1.0.0"
 
 type WebrpcGenVersions = {
   WebrpcGenVersion: string;
diff --git a/_examples/node-ts/server/server.gen.ts b/_examples/node-ts/server/server.gen.ts
index 41644b6..9187217 100644
--- a/_examples/node-ts/server/server.gen.ts
+++ b/_examples/node-ts/server/server.gen.ts
@@ -1,7 +1,7 @@
 /* eslint-disable */
 // node-ts v1.0.0 21701cae51b73d035bf2180831cdb38220bbbccc
 // --
-// Code generated by Webrpc-gen@v0.30.3 with ../../../gen-typescript generator. DO NOT EDIT.
+// Code generated by Webrpc-gen@v0.30.4 with ../../../gen-typescript generator. DO NOT EDIT.
 //
 // webrpc-gen -schema=service.ridl -target=../../../gen-typescript -server -out=./server/server.gen.ts
 
@@ -555,7 +555,7 @@ export const webrpcErrorByCode: { [code: number]: any } = {
 
 export const WebrpcHeader = "Webrpc"
 
-export const WebrpcHeaderValue = "webrpc@v0.30.3;gen-typescript@unknown;node-ts@v1.0.0"
+export const WebrpcHeaderValue = "webrpc@v0.30.4;gen-typescript@unknown;node-ts@v1.0.0"
 
 type WebrpcGenVersions = {
   WebrpcGenVersion: string;
diff --git a/_examples/node-ts/webapp/client.gen.ts b/_examples/node-ts/webapp/client.gen.ts
index 7f9033e..cd453fc 100644
--- a/_examples/node-ts/webapp/client.gen.ts
+++ b/_examples/node-ts/webapp/client.gen.ts
@@ -1,7 +1,7 @@
 /* eslint-disable */
 // node-ts v1.0.0 21701cae51b73d035bf2180831cdb38220bbbccc
 // --
-// Code generated by Webrpc-gen@v0.30.3 with ../../../gen-typescript generator. DO NOT EDIT.
+// Code generated by Webrpc-gen@v0.30.4 with ../../../gen-typescript generator. DO NOT EDIT.
 //
 // webrpc-gen -schema=service.ridl -target=../../../gen-typescript -client -out=./webapp/client.gen.ts
 
@@ -147,7 +147,7 @@ export class Example implements ExampleClient {
 }
 
 const createHttpRequest = (body: string = '{}', headers: object = {}, signal: AbortSignal | null = null): object => {
-  const reqHeaders: { [key: string]: string } = { ...headers, 'Content-Type': 'application/json', 'Webrpc': WebrpcHeaderValue }
+  const reqHeaders: { [key: string]: string } = { ...headers, 'Content-Type': 'application/json', [WebrpcHeader]: WebrpcHeaderValue }
   return { method: 'POST', headers: reqHeaders, body, signal }
 }
 
@@ -496,7 +496,7 @@ export const webrpcErrorByCode: { [code: number]: any } = {
 
 export const WebrpcHeader = "Webrpc"
 
-export const WebrpcHeaderValue = "webrpc@v0.30.3;gen-typescript@unknown;node-ts@v1.0.0"
+export const WebrpcHeaderValue = "webrpc@v0.30.4;gen-typescript@unknown;node-ts@v1.0.0"
 
 type WebrpcGenVersions = {
   WebrpcGenVersion: string;
diff --git a/_examples/sse/webapp/client.gen.ts b/_examples/sse/webapp/client.gen.ts
index 8aab593..6c818b2 100644
--- a/_examples/sse/webapp/client.gen.ts
+++ b/_examples/sse/webapp/client.gen.ts
@@ -1,7 +1,7 @@
 /* eslint-disable */
 // webrpc-sse-chat v1.0.0 a799dc63b082644f5d003c8881424546aee23a2c
 // --
-// Code generated by Webrpc-gen@v0.30.3 with ../../ generator. DO NOT EDIT.
+// Code generated by Webrpc-gen@v0.30.4 with ../../ generator. DO NOT EDIT.
 //
 // webrpc-gen -schema=service.ridl -target=../../ -client -out=./webapp/client.gen.ts
 
@@ -274,7 +274,7 @@ const sseResponse = async (
 
 
 const createHttpRequest = (body: string = '{}', headers: object = {}, signal: AbortSignal | null = null): object => {
-  const reqHeaders: { [key: string]: string } = { ...headers, 'Content-Type': 'application/json', 'Webrpc': WebrpcHeaderValue }
+  const reqHeaders: { [key: string]: string } = { ...headers, 'Content-Type': 'application/json', [WebrpcHeader]: WebrpcHeaderValue }
   return { method: 'POST', headers: reqHeaders, body, signal }
 }
 
@@ -565,7 +565,7 @@ export const webrpcErrorByCode: { [code: number]: any } = {
 
 export const WebrpcHeader = "Webrpc"
 
-export const WebrpcHeaderValue = "webrpc@v0.30.3;@unknown;webrpc-sse-chat@v1.0.0"
+export const WebrpcHeaderValue = "webrpc@v0.30.4;@unknown;webrpc-sse-chat@v1.0.0"
 
 type WebrpcGenVersions = {
   WebrpcGenVersion: string;
diff --git a/clientHelpers.go.tmpl b/clientHelpers.go.tmpl
index 9f84aac..754896c 100644
--- a/clientHelpers.go.tmpl
+++ b/clientHelpers.go.tmpl
@@ -5,7 +5,7 @@
 
 {{- "\n" -}}
 const createHttpRequest = (body: string = '{}', headers: object = {}, signal: AbortSignal | null = null): object => {
-  const reqHeaders: { [key: string]: string } = { ...headers, 'Content-Type': 'application/json' {{- if eq $opts.webrpcHeader true }}, 'Webrpc': WebrpcHeaderValue{{ end }} }
+  const reqHeaders: { [key: string]: string } = { ...headers, 'Content-Type': 'application/json' {{- if eq $opts.webrpcHeader true }}, [WebrpcHeader]: WebrpcHeaderValue{{ end }} }
   return { method: 'POST', headers: reqHeaders, body, signal }
 }