diff --git a/.github/workflows/bookdown.yaml b/.github/workflows/bookdown.yaml
index 2f98f43..9942d44 100644
--- a/.github/workflows/bookdown.yaml
+++ b/.github/workflows/bookdown.yaml
@@ -34,6 +34,12 @@ jobs:
           extra-packages: |
             any::pdftools
 
+      - name: Copy PDF files
+        run: |
+          mkdir -p docs/pdf
+          cp -R pdf/* docs/pdf/
+        shell: bash
+
       - name: Cache bookdown results
         uses: actions/cache@v4
         with:
diff --git a/_bookdown.yml b/_bookdown.yml
index ca81365..e82b2bd 100644
--- a/_bookdown.yml
+++ b/_bookdown.yml
@@ -1,3 +1 @@
 output_dir: "docs"
-copy_resources:
-  - "pdf"
diff --git a/docs/pdf/GS_workshop2024_giotto_intro.pdf b/pdf/GS_workshop2024_giotto_intro.pdf
similarity index 100%
rename from docs/pdf/GS_workshop2024_giotto_intro.pdf
rename to pdf/GS_workshop2024_giotto_intro.pdf
diff --git a/docs/pdf/spatial_omics_technologies_GS_workshop.pdf b/pdf/spatial_omics_technologies_GS_workshop.pdf
similarity index 100%
rename from docs/pdf/spatial_omics_technologies_GS_workshop.pdf
rename to pdf/spatial_omics_technologies_GS_workshop.pdf