diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 66197716..1a5c5781 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 69d06afc..1840100b 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/release_builds.yml b/.github/workflows/release_builds.yml
index c5cf40e8..9502968f 100644
--- a/.github/workflows/release_builds.yml
+++ b/.github/workflows/release_builds.yml
@@ -1,5 +1,8 @@
 name: Release builds
 
+permissions:
+  contents: read
+
 on:
   workflow_call:
     inputs:
diff --git a/.github/workflows/unit_tests.yml b/.github/workflows/unit_tests.yml
index 82976f59..0ad5f4db 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: