Rust 1.91
1.91.1
Release notes ↗
Is Rust 1.91 still supported?
No
Rust 1.91 reached end of life on Dec 11, 2025 (10 months ago). It no longer gets updates, including security fixes. Upgrade to Rust 1.99 (latest 1.99.0).
- Released
- Oct 30, 2025
- End of life
- Dec 11, 2025
10 months ago - Latest version
- 1.91.1
Nov 10, 2025
Upgrade path
The recommended upgrade is Rust 1.99, currently at 1.99.0.
How to upgrade from Rust 1.91 to Rust 1.99
rustup (all platforms)
rustup update stable
rustc --versionOfficial upgrade guide ↗ Back up first, and test on a non-production machine when you move to a new branch.
Quick answers
- Is Rust 1.91 still supported?
- No. Rust 1.91 reached end of life on Dec 11, 2025 (10 months ago). It no longer gets updates, including security fixes. Upgrade to Rust 1.99 (latest 1.99.0).
- When is Rust 1.91 end of life?
- Rust 1.91 reached end of life on Dec 11, 2025. It gets no more updates, including security fixes.
- What is the latest version of Rust 1.91?
- The latest Rust 1.91 release is 1.91.1, released on Nov 10, 2025.
- When was Rust 1.91 released?
- Rust 1.91 was released on Oct 30, 2025.
- What should I upgrade Rust 1.91 to?
- The recommended upgrade is Rust 1.99, currently at 1.99.0.
- How do I check which Rust version I have?
- Run
rustc --version, then paste the result into the “Am I up to date?” box on this page.
Other Rust branches
All 71 →Rust 1.91 release history
RSS- 1.91.1
- 1.91.0
The history fills in as new versions come out.
Keep track
Official release policy · Checked 3 hours ago