diff --git a/Cargo.toml b/Cargo.toml
index 491fcedc..250d8da8 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -13,7 +13,7 @@ edition = "2018"
 rust-version = "1.56.1"
 
 [package.metadata.rbmt.toolchains]
-nightly = "nightly-2026-05-22"
+nightly = "nightly-2026-06-05"
 stable = "stable"
 
 [features]