diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e01d334..2447251 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -6,6 +6,9 @@ on:
   push:
     branches: [main]
 
+permissions:
+  contents: read
+
 jobs:
   build-and-test:
     runs-on: ubuntu-latest
@@ -14,6 +17,6 @@ jobs:
       - name: Configure
         run: cmake -S src -B build
       - name: Build
-        run: cmake --build build
+        run: cmake --build build --parallel
       - name: Test
         run: ./build/archetype --test