diff --git a/codex-rs/rust-toolchain.toml b/codex-rs/rust-toolchain.toml
index 7187a33189e..39227a11b5a 100644
--- a/codex-rs/rust-toolchain.toml
+++ b/codex-rs/rust-toolchain.toml
@@ -1,3 +1,3 @@
 [toolchain]
-channel = "1.90.0"
+channel = "1.91.0"
 components = ["clippy", "rustfmt", "rust-src"]