diff --git a/.github/workflows/lock-closed.yml b/.github/workflows/lock-closed.yml
index 33c6a52..1b33797 100644
--- a/.github/workflows/lock-closed.yml
+++ b/.github/workflows/lock-closed.yml
@@ -3,6 +3,10 @@ on:
   schedule:
     - cron: "0 9 1 * *"
 
+permissions:
+  issues: write
+  pull-requests: write
+
 jobs:
   lock:
     uses: mdn/workflows/.github/workflows/lock-closed.yml@main
diff --git a/.github/workflows/new-issues.yml b/.github/workflows/new-issues.yml
index 373f82c..888ff92 100644
--- a/.github/workflows/new-issues.yml
+++ b/.github/workflows/new-issues.yml
@@ -6,6 +6,10 @@ on:
       - reopened
       - opened
 
+permissions:
+  issues: write
+  pull-requests: write
+
 jobs:
   label-new-issues:
     runs-on: ubuntu-latest
diff --git a/.github/workflows/pr-merge-conflicts.yml b/.github/workflows/pr-merge-conflicts.yml
index f94b9fe..7e67b7a 100644
--- a/.github/workflows/pr-merge-conflicts.yml
+++ b/.github/workflows/pr-merge-conflicts.yml
@@ -5,6 +5,10 @@ on:
   pull_request_target:
     types: [synchronize]
 
+permissions:
+  # Label pull requests.
+  pull-requests: write
+
 jobs:
   label-merge-conflicts:
     uses: mdn/workflows/.github/workflows/pr-rebase-needed.yml@main