diff --git a/.github/workflows/no-channel.yml b/.github/workflows/no-channel.yml
index fb9a95851f06..90c38f22c007 100644
--- a/.github/workflows/no-channel.yml
+++ b/.github/workflows/no-channel.yml
@@ -6,8 +6,13 @@ on:
       - 'nixos-**'
       - 'nixpkgs-**'
 
+permissions:
+  contents: read
+
 jobs:
   fail:
+    permissions:
+      contents: none
     name: "This PR is is targeting a channel branch"
     runs-on: ubuntu-latest
     steps:
diff --git a/.github/workflows/update-terraform-providers.yml b/.github/workflows/update-terraform-providers.yml
index 8bd82acbe791..c966505843a1 100644
--- a/.github/workflows/update-terraform-providers.yml
+++ b/.github/workflows/update-terraform-providers.yml
@@ -5,8 +5,15 @@ on:
     - cron: "14 3 * * 1"
   workflow_dispatch:
 
+permissions:
+  contents: read
+
 jobs:
   tf-providers:
+    permissions:
+      contents: write  # for peter-evans/create-pull-request to create branch
+      issues: write  # for peter-evans/create-or-update-comment to create or update comment
+      pull-requests: write  # for peter-evans/create-pull-request to create a PR
     if: github.repository_owner == 'NixOS' && github.ref == 'refs/heads/master' # ensure workflow_dispatch only runs on master
     runs-on: ubuntu-latest
     steps: