diff --git a/.docker/qgis3-build-deps-focal.dockerfile b/.docker/qgis3-build-deps-focal.dockerfile
index 8f876929ef75..1ec00bbffc12 100644
--- a/.docker/qgis3-build-deps-focal.dockerfile
+++ b/.docker/qgis3-build-deps-focal.dockerfile
@@ -97,6 +97,7 @@ RUN  apt-get update \
     qtbase5-private-dev \
     saga \
     spawn-fcgi \
+    supervisor \
     unzip \
     xauth \
     xfonts-100dpi \