diff --git a/docs/development/README.md b/docs/development/README.md
index 154e2f3a0ec..57d588d1419 100644
--- a/docs/development/README.md
+++ b/docs/development/README.md
@@ -107,20 +107,19 @@ This code of conduct is adapted from the [Contributor Covenant](http://contribut
 
 
 
-## OpenProject Contributor License Agreement (CLA) 
+## OpenProject Contributor License Agreement (CLA)
 
-If you want to contribute to OpenProject, please make sure to accept our Contributor License Agreement first. The contributor license agreement documents the rights granted by contributors to OpenProject. 
+If you want to contribute to OpenProject, please make sure to accept our Contributor License Agreement first. The contributor license agreement documents the rights granted by contributors to OpenProject.
 
 [Read and accept the Contributor License Agreement here.](http://openproject.org/contributor-license-agreement/)
 
 # Additional resources
 
 
-* [Development environment for Ubuntu 16.04.](development-environment-ubuntu)
+* [Development environment for Ubuntu 18.04](development-environment-ubuntu)
 * [Development environment for Mac OS X](development-environment-osx)
 
 * [Developing Plugins](create-openproject-plugin)
 * [Running Tests](running-tests)
 * [API Documentation](/api/)
 * [Report a Bug](report-a-bug)
-
diff --git a/docs/development/development-environment-osx/README.md b/docs/development/development-environment-osx/README.md
index e9b868c6a44..94112eaa262 100644
--- a/docs/development/development-environment-osx/README.md
+++ b/docs/development/development-environment-osx/README.md
@@ -2,7 +2,7 @@
 
 To develop OpenProject a setup similar to that for using OpenProject in production is needed.
 
-This guide assumes that you have a Mac OS Xinstallation installation with administrative rights. 
+This guide assumes that you have a Mac OS Xinstallation installation with administrative rights.
 OpenProject will be installed with a PostgreSQL database.
 
 **Please note**: This guide is NOT suitable for a production setup, but only for developing with it!
@@ -23,7 +23,7 @@ rbenv is a ruby version manager that lets you quickly switch between ruby versio
 ruby-build is an addon to rbenv that installs ruby versions.
 
 ```bash
-# Install 
+# Install
 $ brew install rbenv ruby-build
 # Initialize rbenv
 $ rbenv init
@@ -32,7 +32,7 @@ $ rbenv init
 **Installing ruby-2.6**
 
 With both installed, we can now install the actual ruby version 2.6. You can check available ruby versions with `rbenv install --list`.
-At the time of this writing, the latest stable version is `2.6.1`, which we also require.
+At the time of this writing, the latest stable version is `2.6.5`, which we also require.
 
 We suggest you install the version we require in the [Gemfile](https://github.com/opf/openproject/blob/dev/Gemfile). Search for the `ruby '~> X.Y.Z'` line
 and install that version.
@@ -96,11 +96,12 @@ $ nodenv init
 **Install latest LTS node version**
 
 You can find the latest LTS version here: https://nodejs.org/en/download/
-Currently, this is v12.13.0. Install and activate it with:
+
+At the time of writing this is v12.16.1. Install and activate it with:
 
 ```bash
-nodenv install 12.13.0
-nodenv global 12.13.0
+nodenv install 12.16.1
+nodenv global 12.16.1
 ```
 
 ## Verify your installation
@@ -115,7 +116,7 @@ $ bundler --version
 Bundler version 2.0.2
 
 $ npm --version
-12.13.0
+12.16.1
 ```
 
 # Install OpenProject
diff --git a/docs/development/development-environment-ubuntu/README.md b/docs/development/development-environment-ubuntu/README.md
index 29dc870cb7e..42854c6bdd7 100644
--- a/docs/development/development-environment-ubuntu/README.md
+++ b/docs/development/development-environment-ubuntu/README.md
@@ -5,7 +5,7 @@ To develop OpenProject a setup similar to that for using OpenProject in producti
 This guide assumes that you have a Ubuntu 18.04 installation with administrative rights. This guide will work
 analogous with all other distributions, but may require slight changes in the required packages. _Please, help us to extend this guide with information on other distributions should there be required changes._
 
-OpenProject will be installed with a PostgreSQL database. 
+OpenProject will be installed with a PostgreSQL database.
 
 **Please note**: This guide is NOT suitable for a production setup, but only for developing with it!
 
@@ -32,7 +32,7 @@ ruby-build is an addon to rbenv that installs ruby versions.
 ```bash
 # Install rbenv locally for the dev user
 git clone https://github.com/rbenv/rbenv.git ~/.rbenv
-# Optional: Compile bash extensions 
+# Optional: Compile bash extensions
 cd ~/.rbenv && src/configure && make -C src
 # Add rbenv to the shell's $PATH.
 echo 'export PATH="$HOME/.rbenv/bin:$PATH"' >> ~/.bashrc
@@ -134,12 +134,13 @@ git clone https://github.com/nodenv/node-build.git $(nodenv root)/plugins/node-b
 **Install latest LTS node version**
 
 You can find the latest LTS version here: https://nodejs.org/en/download/
-Currently, this is v12.13.0 Install and activate it with:
+
+At the time of writing this is v12.16.1 Install and activate it with:
 
 ```bash
-nodenv install 12.13.0
-nodenv global 12.13.0
-nodenv rehash 
+nodenv install 12.16.1
+nodenv global 12.16.1
+nodenv rehash
 ```
 
 ## Verify your installation
@@ -154,7 +155,7 @@ bundler --version
 Bundler version 2.0.2
 
 npm --version
-6.12.0
+12.6.1
 ```
 
 # Install OpenProject