diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e441312..8596543 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -8,6 +8,9 @@ on:
     branches: [ master ]
   workflow_dispatch:
 
+permissions:
+  contents: read
+
 jobs:
   test:
     runs-on: ${{ matrix.os }}
diff --git a/.github/workflows/coverage.yml b/.github/workflows/coverage.yml
index 7c0470b..33f8235 100644
--- a/.github/workflows/coverage.yml
+++ b/.github/workflows/coverage.yml
@@ -5,6 +5,9 @@ on:
     branches: [ master ]
   workflow_dispatch:
 
+permissions:
+  contents: read
+
 jobs:
   codecov:
     runs-on: ubuntu-latest