diff --git a/docs/manual/prerequisite.adoc b/docs/manual/prerequisite.adoc
index 262a5153f5..ab609c12be 100644
--- a/docs/manual/prerequisite.adoc
+++ b/docs/manual/prerequisite.adoc
@@ -96,3 +96,6 @@ corresponding tool on the host system:
 * Graph generation tools:
 ** +graphviz+ to use 'graph-depends' and '<pkg>-graph-depends'
 ** +python-matplotlib+ to use 'graph-build'
+
+* Package statistics tools ('pkg-stats'):
+** +python-aiohttp+