diff --git a/clippy_utils/README.md b/clippy_utils/README.md
index d7e40130380d..b5e2e0fbf6c5 100644
--- a/clippy_utils/README.md
+++ b/clippy_utils/README.md
@@ -8,7 +8,7 @@ This crate is only guaranteed to build with this `nightly` toolchain:
 
 <!-- begin autogenerated nightly -->
 ```
-nightly-2026-03-05
+nightly-2026-03-21
 ```
 <!-- end autogenerated nightly -->
 
diff --git a/rust-toolchain.toml b/rust-toolchain.toml
index c9bb94cededb..1f8bcdea8251 100644
--- a/rust-toolchain.toml
+++ b/rust-toolchain.toml
@@ -1,6 +1,6 @@
 [toolchain]
 # begin autogenerated nightly
-channel = "nightly-2026-03-05"
+channel = "nightly-2026-03-21"
 # end autogenerated nightly
 components = ["cargo", "llvm-tools", "rust-src", "rust-std", "rustc", "rustc-dev", "rustfmt"]
 profile = "minimal"