diff --git a/.github/workflows/check-index.yml b/.github/workflows/check-index.yml
index b73c6fd..423e955 100644
--- a/.github/workflows/check-index.yml
+++ b/.github/workflows/check-index.yml
@@ -8,6 +8,9 @@ on:
     branches:
     - check-index-test
 
+permissions:
+  contents: read
+
 jobs:
   build:
 
diff --git a/.github/workflows/mirror.yml b/.github/workflows/mirror.yml
index 1ed440f..6863a26 100644
--- a/.github/workflows/mirror.yml
+++ b/.github/workflows/mirror.yml
@@ -5,6 +5,9 @@ on:
   schedule:
     - cron: '0 0 * * 2'
 
+permissions:
+  contents: read
+
 jobs:
   mirror:
     name: Mirror images