diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 3e21cff5f..bcc129e0b 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -25,7 +25,7 @@ jobs:
 
       - uses: dtolnay/rust-toolchain@master
         with:
-          toolchain: nightly
+          toolchain: nightly-2024-09-09
           components: rustfmt, clippy, miri, rust-src
 
       - uses: Swatinem/rust-cache@v2
@@ -149,7 +149,7 @@ jobs:
 
       - uses: dtolnay/rust-toolchain@master
         with:
-          toolchain: nightly
+          toolchain: nightly-2024-09-09
           components: rust-src
 
       - uses: Swatinem/rust-cache@v2
@@ -243,7 +243,7 @@ jobs:
 
       - uses: dtolnay/rust-toolchain@master
         with:
-          toolchain: nightly
+          toolchain: nightly-2024-09-09
           components: rust-src
           targets: aarch64-unknown-linux-musl,x86_64-unknown-linux-musl
 
diff --git a/.github/workflows/gen.yml b/.github/workflows/gen.yml
index 3f15e0e1f..665f8052e 100644
--- a/.github/workflows/gen.yml
+++ b/.github/workflows/gen.yml
@@ -21,7 +21,7 @@ jobs:
 
       - uses: dtolnay/rust-toolchain@master
         with:
-          toolchain: nightly
+          toolchain: nightly-2024-09-09
           components: rustfmt, clippy
 
       - uses: Swatinem/rust-cache@v2