diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 9526b6f..2c588f9 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -19,7 +19,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v6
-      - uses: actions-rust-lang/setup-rust-toolchain@v1
+      - uses: actions-rust-lang/setup-rust-toolchain@v1.15.4
         with:
           toolchain: ${{ matrix.rust }}
           components: clippy
@@ -47,7 +47,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v6
-      - uses: actions-rust-lang/setup-rust-toolchain@v1
+      - uses: actions-rust-lang/setup-rust-toolchain@v1.15.4
         with:
           components: rustfmt
       - name: Rustfmt Check
@@ -62,7 +62,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v6
-      - uses: actions-rust-lang/setup-rust-toolchain@v1
+      - uses: actions-rust-lang/setup-rust-toolchain@v1.15.4
         with:
           toolchain: ${{ matrix.rust }}
 
diff --git a/.github/workflows/publish-crates-io.yaml b/.github/workflows/publish-crates-io.yaml
index 30bd2be..071c857 100644
--- a/.github/workflows/publish-crates-io.yaml
+++ b/.github/workflows/publish-crates-io.yaml
@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v6
-      - uses: actions-rust-lang/setup-rust-toolchain@v1
+      - uses: actions-rust-lang/setup-rust-toolchain@v1.15.4
       - run: cargo login ${CRATES_IO_TOKEN}
         env:
           CRATES_IO_TOKEN: ${{ secrets.CRATES_IO_TOKEN }}