diff --git a/.github/workflows/ctags.yaml b/.github/workflows/ctags.yaml
index 92465a9..7de3a43 100644
--- a/.github/workflows/ctags.yaml
+++ b/.github/workflows/ctags.yaml
@@ -3,6 +3,9 @@ on:
   pull_request:
     types: [opened, synchronize, reopened, labeled, unlabeled]
 
+permissions:
+  contents: read
+
 jobs:
   legacy:
     name: Legacy ctags test
diff --git a/.github/workflows/publish.yaml b/.github/workflows/publish.yaml
index b22c499..5f9b5e1 100644
--- a/.github/workflows/publish.yaml
+++ b/.github/workflows/publish.yaml
@@ -7,6 +7,10 @@ on:
     branches:
       - 'documentation'
 
+permissions:
+  contents: write
+  pages: write
+
 jobs:
   publish:
     runs-on: macos-latest
diff --git a/.github/workflows/run-differential-tests.yaml b/.github/workflows/run-differential-tests.yaml
index d7996ad..24f4d71 100644
--- a/.github/workflows/run-differential-tests.yaml
+++ b/.github/workflows/run-differential-tests.yaml
@@ -3,6 +3,9 @@ on:
   pull_request:
     types: [opened, synchronize, reopened, labeled, unlabeled]
 
+permissions:
+  contents: read
+
 jobs:
   run-differential-tests:
     if: "!contains(github.event.pull_request.labels.*.name, 'no-test')"