[Home](./index.md) > [puppeteer](./puppeteer.md) > [Protocol](./puppeteer.protocol.md) > [Security](./puppeteer.protocol.security.md) > [CertificateSecurityState](./puppeteer.protocol.security.certificatesecuritystate.md) > [validTo](./puppeteer.protocol.security.certificatesecuritystate.validto.md) ## Protocol.Security.CertificateSecurityState.validTo property Certificate valid to (expiration) date Signature: ```typescript validTo: Network.TimeSinceEpoch; ```