diff --git a/.github/workflows/build_and_deploy.yml b/.github/workflows/build_and_deploy.yml
index 4abf4c0..b25002f 100644
--- a/.github/workflows/build_and_deploy.yml
+++ b/.github/workflows/build_and_deploy.yml
@@ -1,30 +1,55 @@
-name: Build e deploy do livro
-
-on: [push]
-
-jobs:
-  build-and-deploy:
-    runs-on: ubuntu-latest
-    permissions:
-      contents: write
-    steps:
-      - name: Setup GitHub Actions
-        uses: actions/checkout@v3
-
-      - name: Set up Python 3.9
-        uses: actions/setup-python@v3
-        with:
-          python-version: 3.9
-
-      - name: Instalação jupyter-book
-        run: pip install jupyter-book
-
-      - name: Build do livro
-        run: jupyter-book build ./book
-
-      # Push the book's HTML to github-pages
-      - name: GitHub Pages action
-        uses: peaceiris/actions-gh-pages@v3.6.1
-        with:
-          github_token: ${{ secrets.GITHUB_TOKEN }}
-          publish_dir: ./book/_build/html
\ No newline at end of file
+name: Build e deploy do livro
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  build-and-deploy:
+    if: github.event_name == 'push'
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+    steps:
+      - name: Setup GitHub Actions
+        uses: actions/checkout@v3
+
+      - name: Set up Python 3.9
+        uses: actions/setup-python@v3
+        with:
+          python-version: 3.9
+
+      - name: Instalação jupyter-book
+        run: pip install jupyter-book
+
+      - name: Build do livro
+        run: jupyter-book build ./book
+
+      # Push the book's HTML to github-pages
+      - name: GitHub Pages action
+        uses: peaceiris/actions-gh-pages@v3.6.1
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          publish_dir: ./book/_build/html
+
+  build-only:
+    if: github.event_name == 'pull_request'
+    runs-on: ubuntu-latest
+    steps:
+      - name: Setup GitHub Actions
+        uses: actions/checkout@v3
+
+      - name: Set up Python 3.9
+        uses: actions/setup-python@v3
+        with:
+          python-version: 3.9
+
+      - name: Instalação jupyter-book
+        run: pip install jupyter-book
+
+      - name: Build do livro
+        run: jupyter-book build ./book
\ No newline at end of file