diff --git a/.github/workflows/sub_buildUbuntu2004.yml b/.github/workflows/sub_buildUbuntu2004.yml
index 60acb20a8c..b908fa1dc9 100644
--- a/.github/workflows/sub_buildUbuntu2004.yml
+++ b/.github/workflows/sub_buildUbuntu2004.yml
@@ -111,6 +111,7 @@ jobs:
                             libvtk7-dev                                 \
                             libx11-dev                                  \
                             libxerces-c-dev                             \
+                            libyaml-cpp-dev                             \
                             libzipios++-dev                             \
                             netgen                                      \
                             netgen-headers                              \