diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 94e6532..c277391 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -6,6 +6,10 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.head_ref }}
   cancel-in-progress: true
 
+permissions:
+  contents: read
+  pull-requests: read
+
 jobs:
   build:
     runs-on: ubuntu-latest
diff --git a/.github/workflows/initiate_release.yml b/.github/workflows/initiate_release.yml
index c027b01..8f8e82d 100644
--- a/.github/workflows/initiate_release.yml
+++ b/.github/workflows/initiate_release.yml
@@ -7,6 +7,10 @@ on:
         description: "The new version number with 'v' prefix. Example: v1.40.1"
         required: true
 
+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 39111fc..4eba784 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -7,6 +7,10 @@ on:
       - master
       - main
 
+permissions:
+  contents: read
+  pull-requests: read
+
 jobs:
   Release:
     name: 🚀 Release
diff --git a/.github/workflows/reviewdog.yml b/.github/workflows/reviewdog.yml
index 82dfffc..7a8007c 100644
--- a/.github/workflows/reviewdog.yml
+++ b/.github/workflows/reviewdog.yml
@@ -6,6 +6,10 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.head_ref }}
   cancel-in-progress: true
 
+permissions:
+  contents: read
+  pull-requests: read
+
 jobs:
   rubocop:
     name: 🐶 Reviewdog