diff --git a/.github/workflows/draft-pdf.yml b/.github/workflows/draft-pdf.yml
index f781cc26aa0..df0b3e28e51 100644
--- a/.github/workflows/draft-pdf.yml
+++ b/.github/workflows/draft-pdf.yml
@@ -14,7 +14,7 @@ jobs:
           # This should be the path to the paper within your repo.
           paper-path: src/docs/JOSS/paper.md
       - name: Upload
-        uses: actions/upload-artifact@v1
+        uses: actions/upload-artifact@v4
         with:
           name: paper
           # This is the output path where Pandoc will write the compiled
diff --git a/src/docs/JOSS/paper.md b/src/docs/JOSS/paper.md
index 8cb3a73881c..7634697beb4 100644
--- a/src/docs/JOSS/paper.md
+++ b/src/docs/JOSS/paper.md
@@ -112,7 +112,7 @@ A = \left(\begin{array}{@{}c|c|c@{}}
     A_{21} & A_{22} & A_{23}  \\ \hline
     A_{11} & A_{12} & A_{13}  \\ 
 \end{array}\right)
-$$
+$$\label{fig:Monolithic Coupled Matrix represented as block structured matrix}
 
 # Applications
 The development of GEOS targets multi-physics simulations of subsurfaces reservoirs.