diff --git a/Cargo.toml b/Cargo.toml
index 4ff2578c..97a44ba1 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -11,7 +11,7 @@ edition = "2018"
 rust-version = "1.74.0"
 
 [workspace.metadata.rbmt.toolchains]
-nightly = "nightly-2026-05-14"
+nightly = "nightly-2026-06-04"
 stable = "1.96.0"
 
 [features]