diff --git a/.github/workflows/benchmark.yml b/.github/workflows/benchmark.yml
index 8efcec3f33..3d79af6276 100644
--- a/.github/workflows/benchmark.yml
+++ b/.github/workflows/benchmark.yml
@@ -16,7 +16,6 @@ jobs:
       - name: setup rust toolchain
         uses: actions-rs/toolchain@v1
         with:
-          toolchain: stable
           components: rustfmt,clippy
       - name: setup environment
         run: bash ./scripts/dev_setup.sh  -b -t -y
diff --git a/.github/workflows/benchmark_pr.yml b/.github/workflows/benchmark_pr.yml
index 784be1da30..e60dead2e6 100644
--- a/.github/workflows/benchmark_pr.yml
+++ b/.github/workflows/benchmark_pr.yml
@@ -12,8 +12,6 @@ jobs:
           submodules: recursive
       - name: setup rust toolchain
         uses: actions-rs/toolchain@v1
-        with:
-          toolchain: stable
       - uses: boa-dev/criterion-compare-action@master
         env:
           RUST_LOG: error
diff --git a/.github/workflows/codecov.yml b/.github/workflows/codecov.yml
index 2311f58046..c5c2eb3f31 100644
--- a/.github/workflows/codecov.yml
+++ b/.github/workflows/codecov.yml
@@ -17,7 +17,6 @@ jobs:
       - name: setup rust toolchain
         uses: actions-rs/toolchain@v1
         with:
-          toolchain: stable
           components: rustfmt,clippy
       - name: setup environment
         run: bash ./scripts/dev_setup.sh -b -t -y
diff --git a/.github/workflows/release_asset.yml b/.github/workflows/release_asset.yml
index 198ef5cffe..754ca21ab6 100644
--- a/.github/workflows/release_asset.yml
+++ b/.github/workflows/release_asset.yml
@@ -16,17 +16,12 @@ jobs:
           - ubuntu-18.04
           - macos-latest
           - windows-latest
-        toolchain:
-          - stable
     runs-on: ${{matrix.platform}}
     steps:
       - name: Checkout code
         uses: actions/checkout@v2
       - name: install rust toolchain
         uses: actions-rs/toolchain@v1
-        with:
-          toolchain: ${{ matrix.toolchain }}
-          override: true
       - name: Install LLVM and Clang # required for bindgen to work, see https://github.com/rust-lang/rust-bindgen/issues/1797
         uses: KyleMayes/install-llvm-action@v1
         if: matrix.platform == 'windows-latest'