diff --git a/.github/workflows/warm-cache.yml b/.github/workflows/warm-cache.yml
index 85ff8ee..a2247e9 100644
--- a/.github/workflows/warm-cache.yml
+++ b/.github/workflows/warm-cache.yml
@@ -1,5 +1,8 @@
 name: Warm Cache
 
+permissions:
+  contents: read
+
 on:
   schedule:
     - cron: "0 4 * * 1"