diff --git a/.github/workflows/build-image-on-pr.yml b/.github/workflows/build-image-on-pr.yml
index 8ed2569a..472781eb 100644
--- a/.github/workflows/build-image-on-pr.yml
+++ b/.github/workflows/build-image-on-pr.yml
@@ -6,6 +6,9 @@ on:
 
 jobs:
   build:
+    permissions:
+      contents: read
+
     concurrency:
       group: image-pr-${{ github.event.pull_request.number }}
 
diff --git a/.github/workflows/build-image.yml b/.github/workflows/build-image.yml
index 5e914dce..df952fed 100644
--- a/.github/workflows/build-image.yml
+++ b/.github/workflows/build-image.yml
@@ -6,6 +6,9 @@ on:
 
 jobs:
   build:
+    permissions:
+      contents: read
+
     concurrency:
       group: image-${{ github.ref }}
 
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index be30f8df..6af86daf 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -7,6 +7,9 @@ on:
 
 jobs:
   build:
+    permissions:
+      contents: read
+
     concurrency:
       group: ci-${{ github.ref }}