diff --git a/.github/workflows/libc.yml b/.github/workflows/libc.yml
index 5007b49..a14f2fa 100644
--- a/.github/workflows/libc.yml
+++ b/.github/workflows/libc.yml
@@ -3,6 +3,9 @@ name: Benchmark libc
 on:
   workflow_dispatch:
 
+permissions:
+  contents: read
+
 jobs:
   test:
     strategy:
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index d605156..5651bc9 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -17,12 +17,17 @@ on:
       - '**.yml'
   workflow_dispatch:
 
+permissions:
+  contents: read
+
 jobs:
   test:
     strategy:
       matrix:
         os: [macos-latest, ubuntu-latest, windows-latest]
     runs-on: ${{ matrix.os }}
+    permissions:
+      contents: write
 
     steps:
     - uses: actions/checkout@v4