diff --git a/.github/workflows/ci_main.yml b/.github/workflows/ci_main.yml
index 7bd3820c7f..519d69bb67 100644
--- a/.github/workflows/ci_main.yml
+++ b/.github/workflows/ci_main.yml
@@ -4,6 +4,9 @@ on:
   pull_request:
     types: ['opened', 'reopened', 'synchronize']
 
+permissions:
+  contents: read
+
 jobs:
   build:
     runs-on: ubuntu-latest
diff --git a/.github/workflows/ci_ts_latest.yml b/.github/workflows/ci_ts_latest.yml
index 802b611042..ab207255d6 100644
--- a/.github/workflows/ci_ts_latest.yml
+++ b/.github/workflows/ci_ts_latest.yml
@@ -4,6 +4,9 @@ on:
   pull_request:
     types: ['opened', 'reopened', 'synchronize']
 
+permissions:
+  contents: read
+
 jobs:
   build:
     runs-on: ubuntu-latest