diff --git a/binder/environment.yml b/binder/environment.yml
index d44ccc04f7f4621656cab4d9483430fea3e42d86..7ca80394a747e23251f6c24426dc41cc0a869ba9 100644
--- a/binder/environment.yml
+++ b/binder/environment.yml
@@ -1,4 +1,4 @@
-name: improc_beginner
+name: improc_beginner_corr
 channels:
   - conda-forge
 dependencies:
@@ -11,7 +11,8 @@ dependencies:
   - ipywidgets
   - pandas
   - jupyter_contrib_nbextensions
-  - ipyvolume
   - ipympl
+  - nbgrader
   - pip:
-    - requests
\ No newline at end of file
+    - requests
+    - lckr-jupyterlab-variableinspector
\ No newline at end of file
diff --git a/binder/postBuild b/binder/postBuild
index a35937480c0e9f8239843329b4506ac34e92c21d..aaeefa0ca1d85fc4cd47e937bb2f9d6be9f014ee 100644
--- a/binder/postBuild
+++ b/binder/postBuild
@@ -1,13 +1,4 @@
 python installation/download_data.py
 
 mkdir PyImageCourse_beginner
-mv *.ipynb PyImageCourse_beginner/
-
-jupyter labextension install @jupyter-widgets/jupyterlab-manager --no-build
-jupyter labextension install ipyvolume --no-build
-jupyter labextension install jupyter-threejs --no-build
-jupyter labextension install itk-jupyter-widgets --no-build
-jupyter labextension install @lckr/jupyterlab_variableinspector --no-build
-jupyter labextension install jupyter-matplotlib --no-build
-
-jupyter lab build
\ No newline at end of file
+mv *.ipynb PyImageCourse_beginner/
\ No newline at end of file