diff --git a/postBuild b/postBuild
index 00477e1..0f17613 100644
--- a/postBuild
+++ b/postBuild
@@ -6,4 +6,5 @@ python -c "import matplotlib as mpl; mpl.use('Agg'); import pylab as plt; fig, a
 test -e test.png && rm test.png
 
 jupyter labextension install @jupyterlab/latex
+jupyter labextension install @yunabe/lgo_extension
 jupyter lab build