diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 783df5e6..e1fef5b7 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -10,6 +10,9 @@ on:
       - master
   pull_request:
 
+permissions:
+  contents: read
+
 jobs:
   build-and-test:
     runs-on: ubuntu-latest
diff --git a/.github/workflows/docs.yml b/.github/workflows/docs.yml
index bb56bedb..146bf5c3 100644
--- a/.github/workflows/docs.yml
+++ b/.github/workflows/docs.yml
@@ -5,6 +5,10 @@ on:
     branches:
       - master
 
+permissions:
+  # The generated docs are written to the `gh-pages` branch.
+  contents: write
+
 jobs:
   build-and-deploy-docs:
     runs-on: ubuntu-latest