diff --git a/.github/workflows/build_bookdown_pr.yml b/.github/workflows/build_bookdown_pr.yml
index 86c8758..5169d0b 100644
--- a/.github/workflows/build_bookdown_pr.yml
+++ b/.github/workflows/build_bookdown_pr.yml
@@ -16,14 +16,14 @@ jobs:
     runs-on: ubuntu-latest
     
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       
       - uses: r-lib/actions/setup-r@v2
         with:
           crayon.enabled: 'FALSE'
           r-version: '3.6.1'
           
-      - uses: actions/cache@v2
+      - uses: actions/cache@v4
         with:
           path: ~/.local/share/renv
           key: ${{ runner.os }}-renv-${{ hashFiles('**/renv.lock') }}
@@ -52,7 +52,7 @@ jobs:
       - name: Render Book
         run: Rscript -e 'bookdown::render_book("index.Rmd")'
           
-      - uses: actions/upload-artifact@v2
+      - uses: actions/upload-artifact@v4
         with:
           name: _site
           path: _site/
diff --git a/.github/workflows/deploy_bookdown.yml b/.github/workflows/deploy_bookdown.yml
index b0108da..0fd9907 100644
--- a/.github/workflows/deploy_bookdown.yml
+++ b/.github/workflows/deploy_bookdown.yml
@@ -18,7 +18,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
-      - uses: actions/cache@v1
+      - uses: actions/cache@v4
         with:
           path: ~/.local/share/renv
           key: ${{ runner.os }}-renv-${{ hashFiles('**/renv.lock') }}
@@ -65,7 +65,7 @@ jobs:
       - name: Build redirect
         run: Rscript redirect.R
 
-      - uses: actions/upload-artifact@v1
+      - uses: actions/upload-artifact@v4
         with:
           name: _site
           path: _site/
@@ -81,7 +81,7 @@ jobs:
      - name: Checkout
        uses: actions/checkout@master
      - name: Download artifact
-       uses: actions/download-artifact@v1.0.0
+       uses: actions/download-artifact@v4
        with:
          # Artifact name
          name: _site # optional
diff --git a/.github/workflows/deploy_bookdown_wip.yml b/.github/workflows/deploy_bookdown_wip.yml
index e6a5414..6f412aa 100644
--- a/.github/workflows/deploy_bookdown_wip.yml
+++ b/.github/workflows/deploy_bookdown_wip.yml
@@ -13,23 +13,23 @@ jobs:
     runs-on: ubuntu-latest
     
     steps:
-      - uses: actions/checkout@v1
+      - uses: actions/checkout@v4
       
-      - uses: r-lib/actions/setup-r@v1
+      - uses: r-lib/actions/setup-r@v2
         with:
           crayon.enabled: 'FALSE'
           
-      - uses: actions/cache@v1
+      - uses: actions/cache@v4
         with:
           path: ~/.local/share/renv
           key: ${{ runner.os }}-renv-${{ hashFiles('**/renv.lock') }}
           restore-keys: |
             ${{ runner.os }}-renv-
       
-      - uses: r-lib/actions/setup-pandoc@v1
+      - uses: r-lib/actions/setup-pandoc@v2
       
       - name: Install tinytex
-        uses: r-lib/actions/setup-tinytex@master
+        uses: r-lib/actions/setup-tinytex@v2
       
       - name: Install sysreq
         run: sudo apt update && sudo apt install -y gdal-bin git-core libcairo2-dev libgdal-dev libgeos-dev libgeos++-dev libgit2-dev libpng-dev libssh2-1-dev libssl-dev libudunits2-dev libxml2-dev make pandoc pandoc-citeproc zlib1g-dev libmagick++-dev libssl-dev libsasl2-dev
@@ -54,7 +54,7 @@ jobs:
       - name: Render Book
         run: Rscript -e 'bookdown::render_book("index.Rmd", output_dir = "_book/wip")'
       
-      - uses: actions/upload-artifact@v1
+      - uses: actions/upload-artifact@v4
         with:
           name: _book
           path: _book/