diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 9e8519b4..58c23f50 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -6,6 +6,9 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.head_ref }}
   cancel-in-progress: true
 
+permissions:
+  contents: read
+
 jobs:
   ci:
     name: 🧪 Test & lint
diff --git a/.github/workflows/initiate_release.yml b/.github/workflows/initiate_release.yml
index f78e7ea8..6db25a8a 100644
--- a/.github/workflows/initiate_release.yml
+++ b/.github/workflows/initiate_release.yml
@@ -9,6 +9,10 @@ on:
         type: string
         pattern: "^[0-9]+\\.[0-9]+\\.[0-9]+$"
 
+permissions:
+  contents: write
+  pull-requests: write
+
 jobs:
   init_release:
     name: 🚀 Create release PR
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 6d763e1c..c3c52389 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -6,6 +6,10 @@ on:
     branches:
       - main
 
+permissions:
+  contents: read
+  pull-requests: read
+
 jobs:
   Release:
     name: 🚀 Release
diff --git a/.github/workflows/scheduled_test.yml b/.github/workflows/scheduled_test.yml
index 0a27ebc5..ce60398a 100644
--- a/.github/workflows/scheduled_test.yml
+++ b/.github/workflows/scheduled_test.yml
@@ -6,6 +6,10 @@ on:
     # Monday at 9:00 UTC
     - cron: "0 9 * * 1"
 
+permissions:
+  contents: read
+  pull-requests: write
+
 jobs:
   test:
     environment: ci