diff --git a/.github/workflows/docker.yml b/.github/workflows/docker.yml
index 2444e67..e520aa5 100644
--- a/.github/workflows/docker.yml
+++ b/.github/workflows/docker.yml
@@ -4,6 +4,9 @@ on:
   push:
   pull_request:
 
+permissions:
+  contents: read
+
 jobs:
   valid_tag:
     if: github.ref_type == 'tag'