diff --git a/.github/workflows/main-tests.yml b/.github/workflows/main-tests.yml
index 919252df..a72958aa 100644
--- a/.github/workflows/main-tests.yml
+++ b/.github/workflows/main-tests.yml
@@ -9,6 +9,9 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
 
+permissions:
+  contents: read
+
 jobs:
   tests:
     uses: AztecProtocol/aztec-ci-actions/.github/workflows/run-tests.yml@431859e477234b8690eb1f80d1305d2e34f10f1b # v0.1.1
diff --git a/.github/workflows/pr-checks.yml b/.github/workflows/pr-checks.yml
index 3053f025..e002f030 100644
--- a/.github/workflows/pr-checks.yml
+++ b/.github/workflows/pr-checks.yml
@@ -7,6 +7,9 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.event.pull_request.number }}
   cancel-in-progress: true
 
+permissions:
+  contents: read
+
 jobs:
   # Job-level gating (not workflow-level `paths:`) so a skipped benchmark still
   # reports as passing for branch protection.