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About the API Announcements category
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0
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31710
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December 8, 2016
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Minor DNSSEC validation change
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0
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170
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April 2, 2026
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Blocking Some On-Demand Issuance Caused by Internet Scanning
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0
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624
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February 25, 2026
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Ending TLS Client Authentication Certificate Support in 2026
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5
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2522
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February 11, 2026
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Upcoming Changes to Let’s Encrypt Certificates
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2
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30805
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January 7, 2026
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New "Generation Y" Hierarchy of Root and Intermediate Certificates
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0
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426
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November 24, 2025
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New "Y" Root and Intermediate Hierarchy
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0
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607
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September 4, 2025
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Switching issuance to new intermediates
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3
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2665
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August 20, 2025
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Ending OCSP Support in 2025
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3
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1145
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August 6, 2025
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Support Ended for Expiration Notification Emails
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0
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563
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June 4, 2025
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Removing OCSP URLs from Certificates
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1
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1912
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May 7, 2025
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Adding CRL URLs to certificates
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2
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2952
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March 12, 2025
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Support for OCSP Must-Staple Now Disabled
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1
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999
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January 31, 2025
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Ending Support for Expiration Notification Emails
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0
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321
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January 23, 2025
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Announcing Certificate Profile Selection
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0
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533
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January 9, 2025
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Automatic Pausing of Zombie Clients
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2
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1150
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December 5, 2024
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Shortening the Let's Encrypt Chain of Trust
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9
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9716
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September 30, 2024
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Rejecting TLS 1.0 / 1.1 for inbound ACME connections
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3
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2609
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August 26, 2024
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Disabling deprecated TLS cipher suites during validation
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4
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1279
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July 24, 2024
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EDNS Buffer Size Changing to 512 Bytes (In 2024: now 1232)
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2
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7240
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July 8, 2024
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Let’s Encrypt Domain Multiple Perspective Validation Ordering Change
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0
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689
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June 13, 2024
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Deploying Let's Encrypt's New Issuance Chains
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6
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5832
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June 6, 2024
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ECDSA availability in production environment
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1
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32395
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May 30, 2024
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Discontinuing support for ACME clients using draft-ietf-acme-ari-01
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1
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1319
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April 25, 2024
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Let's Encrypt is adding two new remote perspectives for domain validation
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2
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7195
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March 27, 2024
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Let's Encrypt staging is now including a new SCT extension in certificates
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0
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590
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February 17, 2024
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Enabling SHA256 Subject Key Identifiers for end-entity certificates
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3
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1559
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January 25, 2024
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DNS Resolver Upgrade To Unbound 1.19
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1
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1525
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December 20, 2023
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DNS Resolver Upgraded to Unbound 1.18, Empty Responses require SOA sections
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0
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1055
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December 19, 2023
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Simplifying Issuance for Very Long Domain Names
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4
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3515
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November 29, 2023
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