Organizations using PostgreSQL 13 must upgrade before its end-of-life on November 13, 2025, as this will result in the cessation of security patches, bug fixes, and official support. Continuing to use an unsupported version exposes systems to vulnerabilities, which can lead to data breaches and compliance challenges. The last minor release for PostgreSQL 13 was 13.21 in May 2025. Upgrading to newer versions, such as PostgreSQL 16 or 17, offers performance improvements and enhanced features. Strategies for upgrading include using tools like pg_upgrade, pg_dump/pg_restore, and logical replication to minimize downtime. Compatibility issues may arise due to deprecated functions in PostgreSQL 13, necessitating code reviews. Managed services like those from Percona can provide support beyond EOL. The costs of not upgrading can be significant, with potential downtime from security breaches often exceeding migration expenses.