[Home](./index.md) > [sip.js](./sip.js.md) > [OutgoingRequestMessage](./sip.js.outgoingrequestmessage.md) > [setHeader](./sip.js.outgoingrequestmessage.setheader.md) ## OutgoingRequestMessage.setHeader() method Replace the the given header by the given value. Signature: ```typescript setHeader(name: string, value: string | Array): void; ``` ## Parameters | Parameter | Type | Description | | --- | --- | --- | | name | string | header name | | value | string | Array<string> | header value | Returns: `void`