diff --git a/.github/workflows/docker.yml b/.github/workflows/docker.yml
index 616acea..2e73ac4 100644
--- a/.github/workflows/docker.yml
+++ b/.github/workflows/docker.yml
@@ -6,6 +6,9 @@ on:
       - 'master'
   workflow_dispatch:
 
+permissions:
+  contents: read
+
 jobs:
   docker:
     runs-on: ubuntu-latest