diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index a9a0d2c9..b3c4e70d 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -2,6 +2,9 @@ name: tests
 
 on: [push, pull_request]
 
+permissions:
+  contents: read
+
 env:
   # Environment variables to support color support (jaraco/skeleton#66):
   # Request colored output from CLI tools supporting it. Different tools
@@ -133,6 +136,8 @@ jobs:
     needs:
     - check
     if: github.event_name == 'push' && contains(github.ref, 'refs/tags/')
+    permissions:
+      contents: write
     runs-on: ubuntu-latest
 
     steps: