diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 4b1752dd..5fd3d900 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -6,6 +6,9 @@ on:
   push:
     branches: [ main ]
 
+permissions:
+  contents: read
+
 jobs:
   lint:
     runs-on: ubuntu-latest
diff --git a/.github/workflows/e2e-test.yml b/.github/workflows/e2e-test.yml
index d89920eb..d2701e93 100644
--- a/.github/workflows/e2e-test.yml
+++ b/.github/workflows/e2e-test.yml
@@ -10,6 +10,9 @@ on:
   push:
     branches: [ main ]
 
+permissions:
+  contents: read
+
 jobs:
   e2e-test:
     strategy:
diff --git a/.github/workflows/integration-test.yml b/.github/workflows/integration-test.yml
index da70b588..b9002fc3 100644
--- a/.github/workflows/integration-test.yml
+++ b/.github/workflows/integration-test.yml
@@ -6,6 +6,9 @@ on:
     branches: [ main ]
   push:
 
+permissions:
+  contents: read
+
 jobs:
   integration-test:
     runs-on: ubuntu-latest