diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
index 6f30b31..7ee1fd5 100644
--- a/.github/workflows/rust.yml
+++ b/.github/workflows/rust.yml
@@ -47,7 +47,7 @@ jobs:
       RUSTFLAGS: -D warnings
     steps:
       - uses: actions/checkout@v4
-      - uses: actions-rs/toolchain@v1
+      - uses: dtolnay/rust-toolchain@stable
       - uses: taiki-e/install-action@nextest
       - uses: Swatinem/rust-cache@v2
       # make sure benches don't bit-rot
@@ -66,7 +66,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: actions-rs/toolchain@v1
+      - uses: dtolnay/rust-toolchain@stable
         with:
           components: rustfmt, clippy
       - uses: Swatinem/rust-cache@v2
diff --git a/rust-toolchain b/rust-toolchain
deleted file mode 100644
index 2bf5ad0..0000000
--- a/rust-toolchain
+++ /dev/null
@@ -1 +0,0 @@
-stable
diff --git a/rust-toolchain.toml b/rust-toolchain.toml
new file mode 100644
index 0000000..203c03e
--- /dev/null
+++ b/rust-toolchain.toml
@@ -0,0 +1,4 @@
+[toolchain]
+# The default profile includes rustc, rust-std, cargo, rust-docs, rustfmt and clippy.
+profile = "default"
+channel = "stable"