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Regulatory and protocol clock Standard or protocol · International

Let's Encrypt stopped OCSP responses

OCSP service ended on 6 Aug 2025, 1 year ago.

6 Aug 2025 1 year ago Already applies

Let's Encrypt stopped OCSP responses

OCSP service ended · Let's Encrypt announcement of 5 December 2024 · Let's Encrypt (ISRG)

MaritimeIndustryInfrastructure International Standard or protocol

Let's Encrypt stopped issuing certificates with OCSP URLs on 7 May 2025 and switched off its OCSP responders on 6 August 2025. Revocation checks rely on CRLs. Any device or software that hard-requires OCSP for Let's Encrypt certificates has been failing since then.

Let's Encrypt

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