diff --git a/.github/workflows/default_on_push.yml b/.github/workflows/default_on_push.yml
index b390b3cd..5272fc22 100644
--- a/.github/workflows/default_on_push.yml
+++ b/.github/workflows/default_on_push.yml
@@ -14,6 +14,10 @@ on:
     tags:
       - '*.*.*'
 
+permissions:
+  contents: read
+  packages: write
+
 jobs:
   build-and-test-image:
     runs-on: ubuntu-20.04
diff --git a/.github/workflows/docs-preview-prepare.yml b/.github/workflows/docs-preview-prepare.yml
index 975fb72f..003de47d 100644
--- a/.github/workflows/docs-preview-prepare.yml
+++ b/.github/workflows/docs-preview-prepare.yml
@@ -17,6 +17,9 @@ concurrency:
 # `pull_request` workflow is unreliable alone: Non-collaborator contributions lack access to secrets for security reasons.
 # A separate workflow (docs-preview-deploy.yml) handles the deploy after the potentially untrusted code is first run in this workflow.
 # See: https://securitylab.github.com/research/github-actions-preventing-pwn-requests/
+permissions:
+  contents: read
+
 jobs:
   prepare-preview:
     name: 'Build Preview'
diff --git a/.github/workflows/docs-production-deploy.yml b/.github/workflows/docs-production-deploy.yml
index a1520f04..b32fa049 100644
--- a/.github/workflows/docs-production-deploy.yml
+++ b/.github/workflows/docs-production-deploy.yml
@@ -23,6 +23,8 @@ env:
 
 jobs:
   deploy:
+    permissions:
+      contents: write
     name: 'Deploy Docs'
     runs-on: ubuntu-20.04
     steps:
@@ -68,6 +70,8 @@ jobs:
           user_email: ${{ env.GIT_EMAIL }}
 
   add-version-to-docs:
+    permissions:
+      contents: write
     name: 'Update `versions.json` if necessary'
     runs-on: ubuntu-20.04
     if: startsWith(github.ref, 'refs/tags/')
diff --git a/.github/workflows/handle_stalled.yml b/.github/workflows/handle_stalled.yml
index 2289a6e2..1972dc0d 100644
--- a/.github/workflows/handle_stalled.yml
+++ b/.github/workflows/handle_stalled.yml
@@ -4,8 +4,14 @@ on:
   schedule:
     - cron: "0 1 * * *"
 
+permissions:
+  contents: read
+
 jobs:
   stale:
+    permissions:
+      issues: write
+      pull-requests: write
     runs-on: ubuntu-20.04
     steps:
       - name: Close stale issues
diff --git a/.github/workflows/linting.yml b/.github/workflows/linting.yml
index ca5501ef..bacf96b6 100644
--- a/.github/workflows/linting.yml
+++ b/.github/workflows/linting.yml
@@ -7,6 +7,9 @@ on:
     branches:
       - master
 
+permissions:
+  contents: read
+
 jobs:
   lint:
     runs-on: ubuntu-20.04
diff --git a/.github/workflows/scheduled_builds.yml b/.github/workflows/scheduled_builds.yml
index c65aeecf..6f24a3cb 100644
--- a/.github/workflows/scheduled_builds.yml
+++ b/.github/workflows/scheduled_builds.yml
@@ -4,6 +4,9 @@ on:
   schedule:
     - cron: "0 0 * * 5"
 
+permissions:
+  contents: read
+
 jobs:
   publish:
     runs-on: ubuntu-20.04
diff --git a/.github/workflows/test_merge_requests.yml b/.github/workflows/test_merge_requests.yml
index ce493c0a..1612ba82 100644
--- a/.github/workflows/test_merge_requests.yml
+++ b/.github/workflows/test_merge_requests.yml
@@ -11,6 +11,9 @@ on:
       - 'Dockerfile'
       - 'setup.sh'
 
+permissions:
+  contents: read
+
 jobs:
   build-and-test:
     runs-on: ubuntu-20.04