diff --git a/README.md b/README.md
index ed686c8..42c1522 100644
--- a/README.md
+++ b/README.md
@@ -1,10 +1,10 @@
 # Specifying an R environment with a runtime.txt file
 
-Jupyter+R: [![Binder](http://mybinder.org/badge_logo.svg)](http://mybinder.org/v2/gh/binder-examples/r/master?filepath=index.ipynb)
+Jupyter+R: [![Binder](https://mybinder.org/badge_logo.svg)](https://mybinder.org/v2/gh/Robinlovelace/rBinder4/HEAD?filepath=index.ipynb)
 
-RStudio: [![Binder](http://mybinder.org/badge_logo.svg)](http://mybinder.org/v2/gh/binder-examples/r/master?urlpath=rstudio)
+RStudio: [![Binder](https://mybinder.org/badge_logo.svg)](https://mybinder.org/v2/gh/Robinlovelace/rBinder4/HEAD?urlpath=rstudio)
 
-RShiny: [![Binder](http://mybinder.org/badge_logo.svg)](http://mybinder.org/v2/gh/binder-examples/r/master?urlpath=shiny/bus-dashboard/)
+RShiny: [![Binder](https://mybinder.org/badge_logo.svg)](https://mybinder.org/v2/gh/Robinlovelace/rBinder4/HEAD?urlpath=shiny/bus-dashboard/)
 
 Binder supports using R and RStudio, with libraries pinned to a specific 
 snapshot on [MRAN](https://mran.microsoft.com/documents/rro/reproducibility).
diff --git a/install.R b/install.R
index 77bdf26..3d51c36 100644
--- a/install.R
+++ b/install.R
@@ -1,5 +1 @@
-install.packages("tidyverse")
 install.packages("rmarkdown")
-install.packages("httr")
-install.packages("shinydashboard")
-install.packages('leaflet')
diff --git a/runtime.txt b/runtime.txt
index 6a40cb8..1ccacb2 100644
--- a/runtime.txt
+++ b/runtime.txt
@@ -1 +1 @@
-r-3.6-2019-04-12
+r-4.1.0-2021-08-05