diff --git a/postBuild b/postBuild
index d7c12ec..485b6b2 100644
--- a/postBuild
+++ b/postBuild
@@ -1,4 +1,2 @@
 set -ex
-jupyter labextension install @jupyter-widgets/jupyterlab-manager
-jupyter labextension install jupyter-threejs
-
+jupyter labextension install @jupyter-widgets/jupyterlab-manager jupyter-threejs