diff --git a/umich-grader/Dockerfile b/umich-grader/Dockerfile
index 7c0d8e3..46ad8fa 100644
--- a/umich-grader/Dockerfile
+++ b/umich-grader/Dockerfile
@@ -15,11 +15,6 @@ RUN jupyter nbextension enable --sys-prefix create_assignment/main \
 RUN jupyter serverextension disable --sys-prefix nbgrader.server_extensions.assignment_list \
  && jupyter nbextension disable --sys-prefix assignment_list/main --section=tree
 
-# install and activate the async-nbgrader extensions
-RUN jupyter nbextension install --sys-prefix --py async_nbgrader --overwrite \
- && jupyter nbextension enable --sys-prefix --py async_nbgrader \
- && jupyter serverextension enable --sys-prefix --py async_nbgrader
-
 # fix permissions as root
 USER root
 RUN fix-permissions "${JULIA_PKGDIR}" \
diff --git a/umich-notebook/Dockerfile b/umich-notebook/Dockerfile
index 59749f6..7937efb 100644
--- a/umich-notebook/Dockerfile
+++ b/umich-notebook/Dockerfile
@@ -34,10 +34,8 @@ RUN jupyter nbextension install --symlink --sys-prefix --py nbgrader --overwrite
 RUN jupyter nbextension enable --sys-prefix validate_assignment/main --section=notebook \
  && jupyter serverextension enable --sys-prefix nbgrader.server_extensions.validate_assignment
 
-# everyone gets the course list and assignment list extensions
+# everyone assignment list extension
 RUN jupyter serverextension enable --sys-prefix nbgrader.server_extensions.assignment_list \
- && jupyter serverextension enable --sys-prefix nbgrader.server_extensions.course_list \
- && jupyter nbextension enable --sys-prefix course_list/main --section=tree \
  && jupyter nbextension enable --sys-prefix assignment_list/main --section=tree
 
 # update permissions as root
diff --git a/umich-notebook/async-nbgrader b/umich-notebook/async-nbgrader
deleted file mode 160000
index dc22f1c..0000000
--- a/umich-notebook/async-nbgrader
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit dc22f1cd57154aad9540f051d518bb7119b8648f
diff --git a/umich-notebook/requirements.txt b/umich-notebook/requirements.txt
index 3b5ed33..e0cc848 100644
--- a/umich-notebook/requirements.txt
+++ b/umich-notebook/requirements.txt
@@ -1,5 +1,4 @@
 git+https://github.com/jupyter/nbgrader.git@2256b7efd094c4e7863f76ef26d2149b893a4462
-git+https://github.com/IllumiDesk/async-nbgrader.git@dc22f1cd57154aad9540f051d518bb7119b8648f
 jupyter-server-proxy==3.1.0
 nbgitpuller==0.10.2
 psycopg2-binary==2.9.1