diff --git a/environment.yml b/environment.yml
index 8b7d3c0597338e896989b91792ae5694e3f477a9..2ebdf984468a48d1cc1d4b497604a3b97f7b3fd9 100644
--- a/environment.yml
+++ b/environment.yml
@@ -8,3 +8,4 @@ dependencies:
   - numpy
   - scipy
   - rise
+  - jupyter_contrib_nbextensions
diff --git a/postBuild b/postBuild
new file mode 100644
index 0000000000000000000000000000000000000000..7c4ebf402d3474ac115f205ef724ff0b053fc321
--- /dev/null
+++ b/postBuild
@@ -0,0 +1,3 @@
+jupyter contrib nbextension install --user
+jupyter nbextension enable splitcell/splitcell
+