diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 77f4a3ba..3ba0079e 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -1,5 +1,8 @@
 name: Main
 
+permissions:
+  contents: read
+
 on:
   push:
     branches: [main]
diff --git a/.github/workflows/pull_request.yml b/.github/workflows/pull_request.yml
index a90821ab..9a7eae8a 100644
--- a/.github/workflows/pull_request.yml
+++ b/.github/workflows/pull_request.yml
@@ -1,5 +1,8 @@
 name: PR
 
+permissions:
+  contents: read
+
 on:
   pull_request:
     types: [opened, reopened, synchronize]
diff --git a/.github/workflows/pull_request_label.yml b/.github/workflows/pull_request_label.yml
index 8fd47c13..d2da2f1a 100644
--- a/.github/workflows/pull_request_label.yml
+++ b/.github/workflows/pull_request_label.yml
@@ -1,5 +1,8 @@
 name: PR label
 
+permissions:
+  contents: read
+
 on:
   pull_request:
     types: [labeled, unlabeled, opened, reopened, synchronize]
diff --git a/.github/workflows/unit_tests.yml b/.github/workflows/unit_tests.yml
index b5e6e007..5a81961e 100644
--- a/.github/workflows/unit_tests.yml
+++ b/.github/workflows/unit_tests.yml
@@ -1,5 +1,8 @@
 name: Unit tests
 
+permissions:
+  contents: read
+
 on:
   workflow_call:
     inputs: