diff --git a/mapping b/mapping
index b5a26d1..2ea0713 100644
--- a/mapping
+++ b/mapping
@@ -51,4 +51,5 @@ rack = rubygem-rack
 compute = nova
 international_components_for_unicode = icu4c
 node.js = nodejs
-jupyter-core = jupyter_core
\ No newline at end of file
+jupyter-core = jupyter_core
+flatten-json = flatten_json
\ No newline at end of file