diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 8f12ce9..243b042 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -4,6 +4,10 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
 
+# https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#permissions
+permissions:
+  contents: read
+
 on:
   schedule:
     - cron: '0 10 * * *'
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index ea4c225..727cf1f 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -4,6 +4,10 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
 
+# https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#permissions
+permissions:
+  contents: read
+
 on:
   push:
     branches:
diff --git a/.github/workflows/validate.yml b/.github/workflows/validate.yml
index 0844f4d..fb57cb7 100644
--- a/.github/workflows/validate.yml
+++ b/.github/workflows/validate.yml
@@ -4,6 +4,10 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
 
+# https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#permissions
+permissions:
+  contents: read
+
 on:
   push:
     branches: