diff --git a/DESCRIPTION b/DESCRIPTION
index 8c7b473a926351593fd3c27a2146eb26184cf25c..c6d2b9f0a438a9ecaef3c9dc2f32cfcb4c86babc 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -8,16 +8,15 @@ Authors@R: c(
 License: Apache License Version 2.0, January 2004 http://www.apache.org/licenses/
 Description: This package is a collection of functions to apply sequential neutral
              zone classification based on linear mixed models.
-Details: Blabla blabla 
+Details: Package under deveopment ..
 URL: https://git.upd.unibe.ch/openscience/POSEIDON
 BugReports: https://git.upd.unibe.ch/openscience/poseidon/-/issues
 Encoding: UTF-8
 LazyData: true
 Depends: R (>= 4.0.3), emdbook (>= 1.3.12), nlme (>= 3.1), rmarkdown
-Remotes:
-    github::m-clark/mixedup
+Remotes: m-clark/mixedup
 Imports:
-    usethis, MASS, lifecycle
+    usethis, MASS, lifecycle, mixedup
 RoxygenNote: 7.1.2
 Suggests: 
     rmarkdown, knitr, testthat (>= 3.0.0)
diff --git a/Dockerfile b/Dockerfile
index ae3689f3517f5c45311e4f909fdaa642ab222b0b..bb6108384828292e67c5dfdda5e9cc2e79099da7 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,10 +1,12 @@
 # syntax=docker/dockerfile:1
 FROM ubuntu:20.04
 RUN apt-get update -qq
-RUN DEBIAN_FRONTEND="noninteractive" apt-get install -y gnupg2 wget software-properties-common apt-transport-https git
+RUN DEBIAN_FRONTEND="noninteractive" apt-get install -y -qq --no-install-recommends gnupg2 wget software-properties-common apt-transport-https git
 RUN wget -qO- https://cloud.r-project.org/bin/linux/ubuntu/marutter_pubkey.asc | tee -a /etc/apt/trusted.gpg.d/cran_ubuntu_key.asc
 RUN add-apt-repository "deb https://cloud.r-project.org/bin/linux/ubuntu $(lsb_release -cs)-cran40/"
-RUN DEBIAN_FRONTEND="noninteractive" apt-get install -y -qq r-base build-essential libcurl4-gnutls-dev libxml2-dev libssl-dev
-RUN R -e 'install.packages("remotes")'
-RUN R -e 'remotes::install_git(url = "https://git.upd.unibe.ch/openscience/POSEIDON.git")'
+RUN DEBIAN_FRONTEND="noninteractive" apt-get install -y -qq --no-install-recommends build-essential libcurl4-gnutls-dev libxml2-dev libssl-dev
+RUN DEBIAN_FRONTEND="noninteractive" apt-get install -y -qq  r-base
+RUN R --version
+RUN R -e 'install.packages("remotes", Ncpus = 4)'
+RUN R -e 'remotes::install_git(url = "https://git.upd.unibe.ch/openscience/POSEIDON.git",  Ncpus = 6, dependencies = TRUE)'
 RUN R --version
diff --git a/README.Rmd b/README.Rmd
index f2f24dc7099bbbdc88007ff14a4ae7052124fb6d..c11cd813c7a8a7ef6abd011e48d00a5e628d149c 100644
--- a/README.Rmd
+++ b/README.Rmd
@@ -37,7 +37,8 @@ In `R` (tested with version 4.1.1 on Windows 10/11 and Linux), install the requi
 
 ```r
 install.packages("remotes")
-remotes::install_git("https://git.upd.unibe.ch/openscience/POSEIDON")
+remotes::install_git("https://git.upd.unibe.ch/openscience/POSEIDON",
+                     Ncpu = 4, dependencies = TRUE)
 ```
 
 
diff --git a/README.md b/README.md
index 06b65f01665bd41a751d8196396c4fc8393b0ebd..656706580cb7873e74e92a37db0250383f70da17 100644
--- a/README.md
+++ b/README.md
@@ -28,7 +28,8 @@ the required packages as follows.
 
 ``` r
 install.packages("remotes")
-remotes::install_git("https://git.upd.unibe.ch/openscience/POSEIDON")
+remotes::install_git("https://git.upd.unibe.ch/openscience/POSEIDON",
+                     Ncpu = 4, dependencies = TRUE)
 ```
 
 ## Training data