diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
index 17eae173579..3ef7cbbefc1 100644
--- a/.github/workflows/rust.yml
+++ b/.github/workflows/rust.yml
@@ -12,6 +12,7 @@ on:
       - rust/**
       - protos/**
       - .github/workflows/rust.yml
+      - rust-toolchain.toml
       - Cargo.toml
       - Cargo.lock
       - deny.toml
diff --git a/rust-toolchain.toml b/rust-toolchain.toml
index 62b4dcbb1fa..089a799280d 100644
--- a/rust-toolchain.toml
+++ b/rust-toolchain.toml
@@ -1,5 +1,5 @@
 # We keep this pinned to keep clippy and rustfmt in sync between local and CI.
 # Feel free to upgrade to bring in new lints.
 [toolchain]
-channel = "1.90.0"
+channel = "1.91.0"
 components = ["rustfmt", "clippy", "rust-analyzer"]