diff --git a/.github/workflows/appimage-build.yml b/.github/workflows/appimage-build.yml
index d8c58dd0..6f8eb70d 100644
--- a/.github/workflows/appimage-build.yml
+++ b/.github/workflows/appimage-build.yml
@@ -35,7 +35,7 @@ jobs:
             libxkbcommon0 \
             libgtk-3-bin libglib2.0-bin glib-networking shared-mime-info gsettings-desktop-schemas \
             liblua5.4-dev libpci-dev libperl-dev libssl-dev libayatana-appindicator3-dev \
-            perl python3 python3-minimal python3-dev python3-cffi mono-devel desktop-file-utils \
+            perl python3 python3-minimal python3-dev python3-cffi python3-sphinx mono-devel desktop-file-utils \
             breeze-gtk-theme \
             patchelf file curl