diff --git a/.github/workflows/continuous_delivery.yml b/.github/workflows/continuous_delivery.yml
index b6b5e70d..ca229fe0 100644
--- a/.github/workflows/continuous_delivery.yml
+++ b/.github/workflows/continuous_delivery.yml
@@ -4,6 +4,9 @@ on:
   release:
     types: [ published ]
 
+permissions:
+  contents: read
+
 jobs:
   release:
     name: Release Docker image
diff --git a/.github/workflows/continuous_integration.yml b/.github/workflows/continuous_integration.yml
index eded7994..51cd4eeb 100644
--- a/.github/workflows/continuous_integration.yml
+++ b/.github/workflows/continuous_integration.yml
@@ -12,6 +12,9 @@ concurrency:
   group: ${{ (github.event_name == 'pull_request' && github.event.pull_request.number) || 'main' }}
   cancel-in-progress: true
 
+permissions:
+  contents: write
+
 jobs:
 
   lint: