diff --git a/README.md b/README.md
index a8d0986..5e4b6ef 100644
--- a/README.md
+++ b/README.md
@@ -11,6 +11,9 @@ Installation requires R 4.0.0 or greater.
 
 ```r
 install.packages("devtools")
+devtools::install_github("keller-mark/pizzarr")
+devtools::install_github("keller-mark/anndataR", ref="keller-mark/zarr-and-rarr")
+
 devtools::install_github("vitessce/vitessceAnalysisR")
 ```