diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 75f8edb..d1bfd9e 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -3,9 +3,11 @@ on:
   push:
     branches: [main]
   pull_request:
+permissions:
+  contents: read
 jobs:
   sozlesme:
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-26.04
     steps:
       - uses: actions/checkout@v7
       - name: "Sözleşme uyum denetimi (vendored sshpocket doğrulayıcısı; --strict: uyarı da hata)"