diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 05d49aa6..a0c039ba 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -89,5 +89,5 @@ jobs:
       - name: Upload source packages to PPA
         if: startsWith(github.ref, 'refs/tags/v')
         run: |
-          sudo apt install -y devscripts dh-python equivs
+          sudo apt install -y devscripts dh-python equivs python3-sphinx
           ./scripts/build-using-ppa ${PWD}/build jammy