diff --git a/README.md b/README.md
index 83d5db7..ad34f5a 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,7 @@
 
 [![nightly-build](https://github.com/openradar/ams-open-radar-2023/actions/workflows/nightly-build.yaml/badge.svg)](https://github.com/openradar/ams-open-radar-2023/actions/workflows/nightly-build.yaml)
 [![Binder](http://binder.projectpythia.org/badge_logo.svg)](http://binder.projectpythia.org/v2/gh/openradar/ams-open-radar-2023/main?labpath=notebooks)
-[![ARM Jupyterhub Badge](https://img.shields.io/static/v1.svg?logo=Jupyter&label=ARM+JupyterHub&message=Workshop&color=blue)](https://jupyterhub-workshop.svcs.arm.gov/)
+[![ARM Jupyterhub Badge](https://img.shields.io/static/v1.svg?logo=Jupyter&label=ARM+JupyterHub&message=Workshop&color=blue)](https://jupyterhub.arm.gov/)
 
 
 ## Motivation
diff --git a/binder/appendix.txt b/binder/appendix.txt
index d5ffc4d..18f1699 100644
--- a/binder/appendix.txt
+++ b/binder/appendix.txt
@@ -1,12 +1,10 @@
-FROM ubuntu:18.04
 USER root
 ENV DEBIAN_FRONTEND=noninteractive
 RUN apt update && \
     wget -q -O /tmp/lrose.deb https://github.com/NCAR/lrose-core/releases/download/lrose-core-20220222/lrose-core-20220222.ubuntu_18.04.amd64.deb && \
     apt-get -y install /tmp/lrose.deb && \
     apt-get clean && \
-    rm -rf /tmp/lrose.deb && \
-    chmod -R 777 /home/jovyan
+    rm -rf /tmp/lrose.deb
 
 USER ${NB_USER}
 RUN CONDA_DIR=/srv/conda && \
diff --git a/getting-started.md b/getting-started.md
index 991d87c..51e6713 100644
--- a/getting-started.md
+++ b/getting-started.md
@@ -3,7 +3,7 @@
 ## Register for an Atmospheric Radiation Measurement (ARM) User Facility Account
 Participants who do not already have one should first register for an ARM account. When filling out the form, indicate that you are affiliated with the particular workshop or course (AMS Open Radar Short Course):
 
-- Link to [ARM New User Registration](https://adc.arm.gov/armuserreg/#/new)
+- Link to [ARM New User Registration](https://adc.arm.gov/armuserreg/)
 
 ![ARM user registration screenshot](notebooks/images/arm-registration-instructions.png)
 
@@ -13,7 +13,7 @@ After acquiring an ARM account, you will need to follow the workshop Jupyterhub,
 
 Once you receive confirmation that your request has been accepted, click on the following link.
 
-[![badge](https://img.shields.io/static/v1.svg?logo=Jupyter&label=ARM+JupyterHub&message=Workshop&color=blue)](https://jupyterhub-workshop.svcs.arm.gov/)
+[![badge](https://img.shields.io/static/v1.svg?logo=Jupyter&label=ARM+JupyterHub&message=Workshop&color=blue)](https://jupyterhub.arm.gov/)
 
 Once on the Juptyerhub, you will be in the `/notebooks` directory, which contains the content to be used for the short course.