diff --git a/.github/workflows/build-with-clang.yml b/.github/workflows/build-with-clang.yml
index 4f1c09a..249e40b 100644
--- a/.github/workflows/build-with-clang.yml
+++ b/.github/workflows/build-with-clang.yml
@@ -25,7 +25,7 @@ jobs:
 
     steps:
       - name: Cancel Previous Runs
-        uses: styfle/cancel-workflow-action@0.12.1
+        uses: styfle/cancel-workflow-action@85880fa0301c86cca9da44039ee3bb12d3bedbfa # 0.12.1
         with:
           access_token: ${{ github.token }}
 
@@ -44,18 +44,18 @@ jobs:
           sudo apt-get install intel-oneapi-mkl-devel
 
       - name: Setup Python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # v5.6.0
         with:
           python-version: ${{ matrix.python }}
           architecture: x64
 
       - name: Checkout repo
-        uses: actions/checkout@v4
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
         with:
           fetch-depth: 0
 
       - name: Install mkl-service dependencies
-        uses: BSFishy/pip-action@v1
+        uses: BSFishy/pip-action@8f2d471d809dc20b6ada98c91910b6ae6243f318 # v1
         with:
           packages: |
             cython
diff --git a/.github/workflows/conda-package.yml b/.github/workflows/conda-package.yml
index ee60e61..febe878 100644
--- a/.github/workflows/conda-package.yml
+++ b/.github/workflows/conda-package.yml
@@ -25,11 +25,11 @@ jobs:
 
     steps:
       - name: Cancel Previous Runs
-        uses: styfle/cancel-workflow-action@0.12.1
+        uses: styfle/cancel-workflow-action@85880fa0301c86cca9da44039ee3bb12d3bedbfa # 0.12.1
         with:
           access_token: ${{ github.token }}
 
-      - uses: actions/checkout@v4.1.7
+      - uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.1.7
         with:
           fetch-depth: 0
 
@@ -38,7 +38,7 @@ jobs:
           echo "pkgs_dirs: [~/.conda/pkgs]" >> ~/.condarc
 
       - name: Cache conda packages
-        uses: actions/cache@v4
+        uses: actions/cache@5a3ec84eff668545956fd18022155c47e93e2684 # v4.2.3
         env:
           CACHE_NUMBER: 0  # Increase to reset cache
         with:
@@ -68,7 +68,7 @@ jobs:
             conda-recipe
 
       - name: Upload artifact
-        uses: actions/upload-artifact@v4.6.2
+        uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
         with:
           name: ${{ env.PACKAGE_NAME }} ${{ runner.os }} Python ${{ matrix.python }}
           path: /usr/share/miniconda/conda-bld/linux-64/${{ env.PACKAGE_NAME }}-*.conda
@@ -84,21 +84,21 @@ jobs:
 
     steps:
       - name: Cancel Previous Runs
-        uses: styfle/cancel-workflow-action@0.12.1
+        uses: styfle/cancel-workflow-action@85880fa0301c86cca9da44039ee3bb12d3bedbfa # 0.12.1
         with:
           access_token: ${{ github.token }}
 
-      - uses: actions/checkout@v4.1.7
+      - uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.1.7
         with:
           fetch-depth: 0
-      - uses: conda-incubator/setup-miniconda@v3
+      - uses: conda-incubator/setup-miniconda@505e6394dae86d6a5c7fbb6e3fb8938e3e863830 # v3.1.1
         with:
           conda-remove-defaults: true
           auto-activate-base: true
           activate-environment: ""
 
       - name: Cache conda packages
-        uses: actions/cache@v4
+        uses: actions/cache@5a3ec84eff668545956fd18022155c47e93e2684 # v4.2.3
         env:
           CACHE_NUMBER: 3  # Increase to reset cache
         with:
@@ -116,7 +116,7 @@ jobs:
         run: conda build --no-test --python ${{ matrix.python }} -c https://software.repos.intel.com/python/conda -c conda-forge --override-channels conda-recipe
 
       - name: Upload artifact
-        uses: actions/upload-artifact@v4.6.2
+        uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
         with:
           name: ${{ env.PACKAGE_NAME }} ${{ runner.os }} Python ${{ matrix.python }}
           path: ${{ env.conda-bld }}${{ env.PACKAGE_NAME }}-*.conda
@@ -136,7 +136,7 @@ jobs:
 
     steps:
       - name: Download artifact
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@d3f86a106a0bac45b974a628896c90dbdf5c8093 # v4.3.0
         with:
           name: ${{ env.PACKAGE_NAME }} ${{ runner.os }} Python ${{ matrix.python }}
 
@@ -169,7 +169,7 @@ jobs:
           echo "pkgs_dirs: [~/.conda/pkgs]" >> ~/.condarc
 
       - name: Cache conda packages
-        uses: actions/cache@v4
+        uses: actions/cache@5a3ec84eff668545956fd18022155c47e93e2684 # v4.2.3
         env:
           CACHE_NUMBER: 0  # Increase to reset cache
         with:
@@ -210,10 +210,10 @@ jobs:
 
     steps:
       - name: Download artifact
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@d3f86a106a0bac45b974a628896c90dbdf5c8093 # v4.3.0
         with:
           name: ${{ env.PACKAGE_NAME }} ${{ runner.os }} Python ${{ matrix.python }}
-      - uses: conda-incubator/setup-miniconda@v3
+      - uses: conda-incubator/setup-miniconda@505e6394dae86d6a5c7fbb6e3fb8938e3e863830 # v3.1.1
         with:
           conda-remove-defaults: true
           auto-activate-base: true
@@ -244,7 +244,7 @@ jobs:
           more lockfile
 
       - name: Cache conda packages
-        uses: actions/cache@v4
+        uses: actions/cache@5a3ec84eff668545956fd18022155c47e93e2684 # v4.2.3
         env:
           CACHE_NUMBER: 3  # Increase to reset cache
         with:
diff --git a/.github/workflows/openssf-scorecard.yml b/.github/workflows/openssf-scorecard.yml
index de18ad5..65ce187 100644
--- a/.github/workflows/openssf-scorecard.yml
+++ b/.github/workflows/openssf-scorecard.yml
@@ -61,7 +61,7 @@ jobs:
       # Upload the results as artifacts (optional). Commenting out will disable uploads of run results in SARIF
       # format to the repository Actions tab.
       - name: "Upload artifact"
-        uses: actions/upload-artifact@v4.6.2
+        uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
         with:
           name: SARIF file
           path: results.sarif
diff --git a/.github/workflows/pre-commit.yml b/.github/workflows/pre-commit.yml
index b47cb29..84bf377 100644
--- a/.github/workflows/pre-commit.yml
+++ b/.github/workflows/pre-commit.yml
@@ -13,15 +13,15 @@ jobs:
     timeout-minutes: 30
     steps:
     - name: Checkout repo
-      uses: actions/checkout@v4.2.2
+      uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
 
     - name: Set up python
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # v5.6.0
       with:
         python-version: '3.12'
 
     - name: Set up pip packages
-      uses: BSFishy/pip-action@v1
+      uses: BSFishy/pip-action@8f2d471d809dc20b6ada98c91910b6ae6243f318 # v1
       with:
         packages: |
           codespell
@@ -35,4 +35,4 @@ jobs:
         clang-format --version
 
     - name: Run pre-commit checks
-      uses: pre-commit/action@v3.0.1
+      uses: pre-commit/action@2c7b3805fd2a0fd8c1884dcaebf91fc102a13ecd # v3.0.1