diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 1f798749e..d0b1f4d05 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -2,6 +2,9 @@ name: CI
 
 on: [push, pull_request]
 
+permissions:
+  contents: read
+
 jobs:
   ubuntu:
     runs-on: ubuntu-18.04
diff --git a/.github/workflows/nodejs.yml b/.github/workflows/nodejs.yml
index ac92ac7f3..9d4c1a244 100644
--- a/.github/workflows/nodejs.yml
+++ b/.github/workflows/nodejs.yml
@@ -2,6 +2,9 @@ name: CI (node.js)
 
 on: [push, pull_request]
 
+permissions:
+  contents: read
+
 jobs:
   build:
     runs-on: ubuntu-latest