diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 6d470cab4c1c..4bbf128dab3a 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -23,8 +23,9 @@ jobs:
       - name: Checkout sources
         uses: actions/checkout@v3
       - name: Install toolchain
-        uses: dtolnay/rust-toolchain@nightly
+        uses: dtolnay/rust-toolchain@master
         with:
+          toolchain: nightly-2022-12-27
           components: llvm-tools-preview
       - uses: Swatinem/rust-cache@v2
         with:
@@ -104,8 +105,9 @@ jobs:
       - name: Checkout sources
         uses: actions/checkout@v3
       - name: Install toolchain
-        uses: dtolnay/rust-toolchain@nightly
+        uses: dtolnay/rust-toolchain@master
         with:
+          toolchain: nightly-2022-12-27
           components: llvm-tools-preview
       - uses: Swatinem/rust-cache@v2
         with:
@@ -143,8 +145,9 @@ jobs:
       - name: Checkout sources
         uses: actions/checkout@v3
       - name: Install toolchain
-        uses: dtolnay/rust-toolchain@nightly
+        uses: dtolnay/rust-toolchain@master
         with:
+          toolchain: nightly-2022-12-27
           components: rustfmt, clippy
       - uses: Swatinem/rust-cache@v2
         with:
diff --git a/.github/workflows/sanity.yml b/.github/workflows/sanity.yml
index 1b33133fde88..dfee736c4ecf 100644
--- a/.github/workflows/sanity.yml
+++ b/.github/workflows/sanity.yml
@@ -23,8 +23,9 @@ jobs:
       - name: Checkout sources
         uses: actions/checkout@v3
       - name: Install toolchain
-        uses: dtolnay/rust-toolchain@nightly
+        uses: dtolnay/rust-toolchain@master
         with:
+          toolchain: nightly-2022-12-27
           components: llvm-tools-preview
       - uses: Swatinem/rust-cache@v2
         with:
@@ -68,7 +69,9 @@ jobs:
       - name: Checkout sources
         uses: actions/checkout@v3
       - name: Install toolchain
-        uses: dtolnay/rust-toolchain@nightly
+        uses: dtolnay/rust-toolchain@master
+        with:
+          toolchain: nightly-2022-12-27
 
       - name: Install cargo-udeps
         run: cargo install cargo-udeps --locked