diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 65ad37f..f338ab6 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -8,7 +8,7 @@ on:
 
 jobs:
   build:
-    uses: OpenAstronomy/github-actions-workflows/.github/workflows/publish_pure_python.yml@v1
+    uses: OpenAstronomy/github-actions-workflows/.github/workflows/publish_pure_python.yml@924441154cf3053034c6513d5e06c69d262fb9a6  # v1.13.0
     with:
       test_command: python -c "import stsci.tools"
       upload_to_pypi: ${{ (github.event_name == 'release') && (github.event.action == 'released') }}
diff --git a/.github/workflows/ci_workflows.yml b/.github/workflows/ci_workflows.yml
index 29ca587..6de8ec8 100644
--- a/.github/workflows/ci_workflows.yml
+++ b/.github/workflows/ci_workflows.yml
@@ -23,11 +23,11 @@ jobs:
   #  runs-on: ubuntu-latest
   #  steps:
   #  - name: Checkout code
-  #    uses: actions/checkout@v4
+  #    uses: actions/checkout@d632683dd7b4114ad314bca15554477dd762a938  # v4.2.0
   #    with:
   #      fetch-depth: 0
   #  - name: Set up Python
-  #    uses: actions/setup-python@v5
+  #    uses: actions/setup-python@f677139bbe7f9c59b41e40162b753c062f5d49a3  # v5.2.0
   #    with:
   #      python-version: '3.x'
   #  - name: Lint with flake8
@@ -39,11 +39,11 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout code
-      uses: actions/checkout@v4
+      uses: actions/checkout@d632683dd7b4114ad314bca15554477dd762a938  # v4.2.0
       with:
         fetch-depth: 0
     - name: Set up Python
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@f677139bbe7f9c59b41e40162b753c062f5d49a3  # v5.2.0
       with:
         python-version: '3.x'
     # Make sure that packaging will work
@@ -61,11 +61,11 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout code
-      uses: actions/checkout@v4
+      uses: actions/checkout@d632683dd7b4114ad314bca15554477dd762a938  # v4.2.0
       with:
         fetch-depth: 0
     - name: Set up Python
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@f677139bbe7f9c59b41e40162b753c062f5d49a3  # v5.2.0
       with:
         python-version: '3.11'
     - name: Install and build
@@ -80,11 +80,11 @@ jobs:
     needs: [pep_and_audit, initial_tests]
     steps:
     - name: Checkout code
-      uses: actions/checkout@v4
+      uses: actions/checkout@d632683dd7b4114ad314bca15554477dd762a938  # v4.2.0
       with:
         fetch-depth: 0
     - name: Set up Python
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@f677139bbe7f9c59b41e40162b753c062f5d49a3  # v5.2.0
       with:
         python-version: '3.13-dev'
     - name: Install and build
@@ -102,11 +102,11 @@ jobs:
     needs: [pep_and_audit, initial_tests]
     steps:
     - name: Checkout code
-      uses: actions/checkout@v4
+      uses: actions/checkout@d632683dd7b4114ad314bca15554477dd762a938  # v4.2.0
       with:
         fetch-depth: 0
     - name: Set up Python
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@f677139bbe7f9c59b41e40162b753c062f5d49a3  # v5.2.0
       with:
         python-version: '3.8'
     - name: Install and build
@@ -122,9 +122,9 @@ jobs:
     needs: [pep_and_audit, initial_tests]
     steps:
     - name: Checkout code
-      uses: actions/checkout@v4
+      uses: actions/checkout@d632683dd7b4114ad314bca15554477dd762a938  # v4.2.0
     - name: Set up Python
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@f677139bbe7f9c59b41e40162b753c062f5d49a3  # v5.2.0
       with:
         python-version: '3.x'
     - name: Install and build
diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
index fae9e15..78ed24c 100644
--- a/.github/workflows/codeql-analysis.yml
+++ b/.github/workflows/codeql-analysis.yml
@@ -37,11 +37,11 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v4
+      uses: actions/checkout@d632683dd7b4114ad314bca15554477dd762a938  # v4.2.0
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL
-      uses: github/codeql-action/init@v3
+      uses: github/codeql-action/init@5618c9fc1e675841ca52c1c6b1304f5255a905a0  # codeql-bundle-v2.19.0
       with:
         languages: ${{ matrix.language }}
         # If you wish to specify custom queries, you can do so here or in a config file.
@@ -52,7 +52,7 @@ jobs:
     # Autobuild attempts to build any compiled languages  (C/C++, C#, or Java).
     # If this step fails, then you should remove it and run the build manually (see below)
     - name: Autobuild
-      uses: github/codeql-action/autobuild@v3
+      uses: github/codeql-action/autobuild@5618c9fc1e675841ca52c1c6b1304f5255a905a0  # codeql-bundle-v2.19.0
 
     # ℹ️ Command-line programs to run using the OS shell.
     # 📚 https://git.io/JvXDl
@@ -66,4 +66,4 @@ jobs:
     #   make release
 
     - name: Perform CodeQL Analysis
-      uses: github/codeql-action/analyze@v3
+      uses: github/codeql-action/analyze@5618c9fc1e675841ca52c1c6b1304f5255a905a0  # codeql-bundle-v2.19.0
diff --git a/.github/workflows/open_actions.yml b/.github/workflows/open_actions.yml
index 1f445ba..0bf14b3 100644
--- a/.github/workflows/open_actions.yml
+++ b/.github/workflows/open_actions.yml
@@ -13,12 +13,12 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Label PR
-      uses: actions/labeler@v5
+      uses: actions/labeler@8558fd74291d67161a8a78ce36a881fa63b766a9  # v5.0.0
       if: github.event_name == 'pull_request_target' || github.event_name == 'pull_request'
       with:
         repo-token: "${{ secrets.GITHUB_TOKEN }}"
     - name: 'Comment Draft PR'
-      uses: actions/github-script@v7
+      uses: actions/github-script@60a0d83039c74a4aee543508d2ffcb1c3799cdea  # v7.0.1
       if: github.event.pull_request.draft == true
       with:
         github-token: ${{ secrets.GITHUB_TOKEN }}
diff --git a/.github/workflows/predeps_workflow.yml b/.github/workflows/predeps_workflow.yml
index 0e914b2..f287431 100644
--- a/.github/workflows/predeps_workflow.yml
+++ b/.github/workflows/predeps_workflow.yml
@@ -20,11 +20,11 @@ jobs:
         #os: [ubuntu-latest, windows-latest, macos-latest]
     steps:
     - name: Checkout code
-      uses: actions/checkout@v4
+      uses: actions/checkout@d632683dd7b4114ad314bca15554477dd762a938  # v4.2.0
       with:
         fetch-depth: 0
     - name: Set up Python
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@f677139bbe7f9c59b41e40162b753c062f5d49a3  # v5.2.0
       with:
         python-version: '3.13-dev'
     - name: Install and build