diff --git a/.github/workflows/release-pr.yml b/.github/workflows/release-pr.yml
index 7b62a75c..6224c183 100644
--- a/.github/workflows/release-pr.yml
+++ b/.github/workflows/release-pr.yml
@@ -18,7 +18,7 @@ jobs:
         package: [neptune]
     steps:
       - uses: actions/checkout@v4
-      - uses: actions-rs/toolchain@v1
+      - uses: dtolnay/rust-toolchain@stable
         with:
             profile: minimal
       - name: Get current version
diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
index ffef55fe..a118ba8d 100644
--- a/.github/workflows/rust.yml
+++ b/.github/workflows/rust.yml
@@ -44,7 +44,7 @@ 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
@@ -65,7 +65,7 @@ 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
@@ -102,7 +102,7 @@ jobs:
       EC_GPU_FRAMEWORK: cuda
     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
       # Check we have access to the machine's Nvidia drivers
@@ -132,7 +132,7 @@ jobs:
       EC_GPU_FRAMEWORK: opencl
     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
       - name: Install GPU deps
diff --git a/rust-toolchain b/rust-toolchain
deleted file mode 100644
index 5e3a4256..00000000
--- a/rust-toolchain
+++ /dev/null
@@ -1 +0,0 @@
-1.73.0
diff --git a/rust-toolchain.toml b/rust-toolchain.toml
new file mode 100644
index 00000000..de718234
--- /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 = "1.73"