diff --git a/.github/workflows/build_doc.yml b/.github/workflows/build_doc.yml
index 11112e5a3b9..2591ff53482 100644
--- a/.github/workflows/build_doc.yml
+++ b/.github/workflows/build_doc.yml
@@ -81,7 +81,7 @@ jobs:
             done
             cp -r ./doc_output/Manual ../cgal.github.io/${PR_NUMBER}/$ROUND    
             cd ../cgal.github.io
-            egrep -v " ${PR_NUMBER}\." index.html > tmp.html
+            egrep -v " ${PR_NUMBER}\." index.html > tmp.html || true
             echo "<li><a href=https://cgal.github.io/${PR_NUMBER}/$ROUND/Manual/index.html>Manual for PR ${PR_NUMBER} ($ROUND).</a></li>" >> ./tmp.html
             mv tmp.html index.html
             git add ${PR_NUMBER}/$ROUND && git commit -q --amend -m "base commit" && git push -q -f -u origin master
diff --git a/.github/workflows/delete_doc.yml b/.github/workflows/delete_doc.yml
index 6a8d6bc15be..2e3594a12d6 100644
--- a/.github/workflows/delete_doc.yml
+++ b/.github/workflows/delete_doc.yml
@@ -18,7 +18,7 @@ jobs:
          git clone https://maxGimeno:${{ secrets.PUSH_TO_CGAL_GITHUB_IO_TOKEN }}@github.com/CGAL/cgal.github.io.git --depth=5
          PR_NUMBER=$(python -c "import json; import os; y = json.load(open(os.environ['GITHUB_EVENT_PATH'])); print(y[\"number\"])")
          cd cgal.github.io/
-         egrep -v " ${PR_NUMBER}\." index.html > tmp.html
+         egrep -v " ${PR_NUMBER}\." index.html > tmp.html || true
          if [ -n "$(diff -q ./index.html ./tmp.html)" ]; then
            mv tmp.html index.html
            #git commit -a -m "Remove ${PR_NUMBER}" && git push -u origin master