diff --git a/.gitlab-ci/debian-unstable.Dockerfile b/.gitlab-ci/debian-unstable.Dockerfile
index 6c6385b..a5dc150 100644
--- a/.gitlab-ci/debian-unstable.Dockerfile
+++ b/.gitlab-ci/debian-unstable.Dockerfile
@@ -12,6 +12,7 @@ RUN apt-get update -qq && apt-get install --no-install-recommends -qq -y \
     libglib2.0-dev \
     libglib-testing-0-dev \
     libgtk-3-dev \
+    libhandy-1-dev \
     libpam0g-dev \
     libpolkit-gobject-1-dev \
     libxml2-utils \