diff --git a/.github/workflows/jekyll-gh-pages.yml b/.github/workflows/jekyll-gh-pages.yml
index 559bddf..e2ca051 100644
--- a/.github/workflows/jekyll-gh-pages.yml
+++ b/.github/workflows/jekyll-gh-pages.yml
@@ -11,15 +11,15 @@ on:
 
 # Sets permissions of the GITHUB_TOKEN to allow deployment to GitHub Pages
 permissions:
+  repository-projects: read
   contents: read
   pages: write
   id-token: write
 
-# Allow only one concurrent deployment, skipping runs queued between the run in-progress and latest queued.
-# However, do NOT cancel in-progress runs as we want to allow these production deployments to complete.
+# Allow one concurrent deployment
 concurrency:
   group: "pages"
-  cancel-in-progress: false
+  cancel-in-progress: true
 
 jobs:
   # Build job
@@ -28,15 +28,18 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v3
+        with:
+          token: ${{ secrets.PAGES_PAT }}
+          submodules: true
       - name: Setup Pages
-        uses: actions/configure-pages@v3
+        uses: actions/configure-pages@v2
       - name: Build with Jekyll
         uses: actions/jekyll-build-pages@v1
         with:
           source: ./
           destination: ./_site
       - name: Upload artifact
-        uses: actions/upload-pages-artifact@v2
+        uses: actions/upload-pages-artifact@v1
 
   # Deployment job
   deploy:
@@ -48,4 +51,4 @@ jobs:
     steps:
       - name: Deploy to GitHub Pages
         id: deployment
-        uses: actions/deploy-pages@v2
+        uses: actions/deploy-pages@v1
\ No newline at end of file
diff --git a/README.Rmd b/README.Rmd
index 12f6a68..c4e4dee 100644
--- a/README.Rmd
+++ b/README.Rmd
@@ -23,7 +23,7 @@ fs::dir_ls("materiais/slides", glob = "*.html") |>
   tibble::enframe() |>
   dplyr::filter(
     stringr::str_detect(name, "a[0-9]{2}|a_"),
-    !stringr::str_detect(name, "a_00")
+    !stringr::str_detect(name, "a00")
   ) |>
   dplyr::transmute(
     aula = stringr::str_extract(value, "(?<=_)[a-z_A-Z]+"),
diff --git a/README.md b/README.md
index 8301e64..f86c18e 100644
--- a/README.md
+++ b/README.md
@@ -10,7 +10,6 @@ quantitativa, com aplicações em temas do Direito.
 
 | aula                   | slide                                                                                                       |
 | :--------------------- | :---------------------------------------------------------------------------------------------------------- |
-| introducao             | [introducao](https://abjur.github.io/202310-ipj/materiais/slides/a00_introducao.html)                       |
 | operacionalizacao      | [operacionalizacao](https://abjur.github.io/202310-ipj/materiais/slides/a01_operacionalizacao.html)         |
 | escopo                 | [escopo](https://abjur.github.io/202310-ipj/materiais/slides/a02_escopo.html)                               |
 | tipos\_variaveis       | [tipos\_variaveis](https://abjur.github.io/202310-ipj/materiais/slides/a03_tipos_variaveis.html)            |