diff --git a/.github/workflows/benchmark.yml b/.github/workflows/benchmark.yml
index 17a206cf..e0f50d85 100644
--- a/.github/workflows/benchmark.yml
+++ b/.github/workflows/benchmark.yml
@@ -7,6 +7,10 @@ on:
   # Allows to run this workflow manually from the Actions tab
   workflow_dispatch:
 
+permissions:
+  # Contents permission needed to create a commit comment
+  contents: write
+
 jobs:
   benchmark:
     name: Run Schematron benchmark