diff --git a/.github/workflows/assign-to-project.yml b/.github/workflows/assign-to-project.yml
index 89e500e..6742c26 100644
--- a/.github/workflows/assign-to-project.yml
+++ b/.github/workflows/assign-to-project.yml
@@ -8,34 +8,45 @@ on:
 env:
   GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
+permissions:
+  contents: read
+
 jobs:
   assign-to-project:
+    permissions:
+      repository-projects: write  # for srggrs/assign-one-project-github-action to assign issues and PRs to repo project
     runs-on: ubuntu-latest
     name: Assign to Project
     steps:
+    
+    - name: Harden Runner
+      uses: step-security/harden-runner@74b568e8591fbb3115c70f3436a0c6b0909a8504
+      with:
+        egress-policy: audit # TODO: change to 'egress-policy: block' after couple of runs
+
     - name: Assign Issues to Bugs
-      uses: srggrs/assign-one-project-github-action@1.3.1
+      uses: srggrs/assign-one-project-github-action@4d59cc619499b55ca689fb13cfcc72324a8b8435
       if: contains(github.event.issue.labels.*.name, 'bug')
       with:
         project: 'https://github.com/irongut/CodeCoverageSummary/projects/1'
         column_name: 'Needs triage'
 
     - name: Assign Issues to Enhancements
-      uses: srggrs/assign-one-project-github-action@1.3.1
+      uses: srggrs/assign-one-project-github-action@4d59cc619499b55ca689fb13cfcc72324a8b8435
       if: contains(github.event.issue.labels.*.name, 'enhancement')
       with:
         project: 'https://github.com/irongut/CodeCoverageSummary/projects/2'
         column_name: 'To do'
 
     - name: Assign PRs to Bugs
-      uses: srggrs/assign-one-project-github-action@1.3.1
+      uses: srggrs/assign-one-project-github-action@4d59cc619499b55ca689fb13cfcc72324a8b8435
       if: contains(github.event.pull_request.labels.*.name, 'bug')
       with:
         project: 'https://github.com/irongut/CodeCoverageSummary/projects/1'
         column_name: 'In Progress'
 
     - name: Assign PRs to Enhancements
-      uses: srggrs/assign-one-project-github-action@1.3.1
+      uses: srggrs/assign-one-project-github-action@4d59cc619499b55ca689fb13cfcc72324a8b8435
       if: contains(github.event.pull_request.labels.*.name, 'enhancement')
       with:
         project: 'https://github.com/irongut/CodeCoverageSummary/projects/2'
diff --git a/.github/workflows/auto-assign-pr.yml b/.github/workflows/auto-assign-pr.yml
index cb6e91b..10c7b0e 100644
--- a/.github/workflows/auto-assign-pr.yml
+++ b/.github/workflows/auto-assign-pr.yml
@@ -7,11 +7,22 @@ on:
   pull_request:
     types: [opened]
 
+permissions:
+  contents: read
+
 jobs:
   assignAuthor:
+    permissions:
+      pull-requests: write  # for samspills/assign-pr-to-author
     runs-on: ubuntu-latest
     steps:
+
+    - name: Harden Runner
+      uses: step-security/harden-runner@74b568e8591fbb3115c70f3436a0c6b0909a8504
+      with:
+        egress-policy: audit # TODO: change to 'egress-policy: block' after couple of runs
+
     - name: Auto Assign PR
-      uses: samspills/assign-pr-to-author@v1.0.1
+      uses: samspills/assign-pr-to-author@223a87a821f7e7447cfb5221bc53ceeb633341c2
       with:
         repo-token: '${{ secrets.GITHUB_TOKEN }}'
diff --git a/.github/workflows/mark-stale.yml b/.github/workflows/mark-stale.yml
index bdbe3f2..4f2542d 100644
--- a/.github/workflows/mark-stale.yml
+++ b/.github/workflows/mark-stale.yml
@@ -4,14 +4,25 @@ on:
   schedule:
   - cron: "30 1 * * *"
 
+permissions:
+  contents: read
+
 jobs:
   stale:
 
+    permissions:
+      issues: write  # for actions/stale to close stale issues
+      pull-requests: write  # for actions/stale to close stale PRs
     runs-on: ubuntu-latest
-
     steps:
+
+    - name: Harden Runner
+      uses: step-security/harden-runner@74b568e8591fbb3115c70f3436a0c6b0909a8504
+      with:
+        egress-policy: audit # TODO: change to 'egress-policy: block' after couple of runs
+
     - name: Mark Stale
-      uses: actions/stale@v3
+      uses: actions/stale@98ed4cb500039dbcccf4bd9bedada4d0187f2757
       with:
         repo-token: ${{ secrets.GITHUB_TOKEN }}
         exempt-all-milestones: true
diff --git a/.github/workflows/pr-labeler.yml b/.github/workflows/pr-labeler.yml
index aa1a9f8..1d21c53 100644
--- a/.github/workflows/pr-labeler.yml
+++ b/.github/workflows/pr-labeler.yml
@@ -7,10 +7,22 @@ name: PR Labeler
 on: 
   pull_request_target:
 
+permissions:
+  contents: read
+
 jobs:
   label:
+    permissions:
+      contents: read  # for actions/labeler to determine modified files
+      pull-requests: write  # for actions/labeler to add labels to PRs
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/labeler@v3
+    
+    - name: Harden Runner
+      uses: step-security/harden-runner@74b568e8591fbb3115c70f3436a0c6b0909a8504
+      with:
+        egress-policy: audit # TODO: change to 'egress-policy: block' after couple of runs
+
+    - uses: actions/labeler@472c5d3aaacde439785e94966eb2e545627f4935
       with:
         repo-token: "${{ secrets.GITHUB_TOKEN }}"