diff --git a/README.md b/README.md
index 8a4b572..55f795c 100644
--- a/README.md
+++ b/README.md
@@ -2,3 +2,8 @@
 
 List of R packages, required by some services.
 The packages can be sources from  CRAN-like repositories, sources from github, or - preferred - packages in deb format.
+
+## install2r-packages.txt
+
+That file is used by the Dockerfile that builds the Rstudio container images. Packages listed there are installed from a binary repository to speed up the installation procedure and preserve disk space.
+
diff --git a/install2r-packages.txt b/install2r-packages.txt
index 5918e60..8e4d00f 100644
--- a/install2r-packages.txt
+++ b/install2r-packages.txt
@@ -320,3 +320,5 @@ redland
 pdftools
 nloptr
 properties
+neuralnet
+e1071
diff --git a/r_cran_pkgs.txt b/r_cran_pkgs.txt
index 9242873..eef998a 100644
--- a/r_cran_pkgs.txt
+++ b/r_cran_pkgs.txt
@@ -22,3 +22,5 @@ d4storagehub4R
 LBSPR
 purrr
 properties
+neuralnet
+e1071
diff --git a/test_r_cran_pkgs.txt b/test_r_cran_pkgs.txt
index 9242873..eef998a 100644
--- a/test_r_cran_pkgs.txt
+++ b/test_r_cran_pkgs.txt
@@ -22,3 +22,5 @@ d4storagehub4R
 LBSPR
 purrr
 properties
+neuralnet
+e1071