diff --git a/.github/workflows/phpstan.yml b/.github/workflows/phpstan.yml
index 65e9a6427b..30948c7c5b 100644
--- a/.github/workflows/phpstan.yml
+++ b/.github/workflows/phpstan.yml
@@ -12,6 +12,9 @@ on:
   # Allow manually triggering the workflow.
   workflow_dispatch:
 
+permissions:
+  contents: read # to fetch code (actions/checkout)
+
 jobs:
   phpstan:
     name: "PHP: 7.4 | PHPStan"
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 04c7cba00a..605cf33416 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -12,6 +12,9 @@ on:
   # Allow manually triggering the workflow.
   workflow_dispatch:
 
+permissions:
+  contents: read # to fetch code (actions/checkout)
+
 jobs:
   build:
     runs-on: ubuntu-latest
diff --git a/.github/workflows/validate.yml b/.github/workflows/validate.yml
index 887b9c2b7b..d868179d92 100644
--- a/.github/workflows/validate.yml
+++ b/.github/workflows/validate.yml
@@ -12,6 +12,9 @@ on:
   # Allow manually triggering the workflow.
   workflow_dispatch:
 
+permissions:
+  contents: read # to fetch code (actions/checkout)
+
 jobs:
   checkxml:
     name: Check XML files