diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 0fecf91..6796855 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 586bcc0..36712a6 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:
     branches: [main]
diff --git a/.github/workflows/pull_request_label.yml b/.github/workflows/pull_request_label.yml
index d83c599..096f66e 100644
--- a/.github/workflows/pull_request_label.yml
+++ b/.github/workflows/pull_request_label.yml
@@ -1,5 +1,8 @@
 name: PR
 
+permissions:
+  contents: read
+
 on:
   pull_request:
     types: [labeled, unlabeled, opened, reopened, synchronize]
diff --git a/.github/workflows/soundness.yml b/.github/workflows/soundness.yml
index c4f40cd..23f77d2 100644
--- a/.github/workflows/soundness.yml
+++ b/.github/workflows/soundness.yml
@@ -1,5 +1,8 @@
 name: Soundness
 
+permissions:
+  contents: read
+
 on:
   workflow_call: