3 files changed, 15 insertions, 5 deletions

diff --git a/.travis.yml b/.travis.yml
index 76efedd50..068067796 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,7 +1,6 @@
 language: node_js
 
 node_js:
-  - "4"
   - "6"
 
 env:
diff --git a/README.md b/README.md
index 750522dd6..6e54e5bdb 100644
--- a/README.md
+++ b/README.md
@@ -121,7 +121,7 @@ See [wiki](https://github.com/Chocobozzz/PeerTube/wiki) for complete installatio
 
 ### Dependencies
 
-  * **NodeJS >= 4.x**
+  * **NodeJS >= 6.x**
   * **npm >= 3.x**
   * OpenSSL (cli)
   * PostgreSQL
@@ -129,13 +129,12 @@ See [wiki](https://github.com/Chocobozzz/PeerTube/wiki) for complete installatio
 
 #### Debian
 
-  * Install NodeJS 4.x (actual LTS): [https://nodejs.org/en/download/package-manager/#debian-and-ubuntu-based-linux-distributions](https://nodejs.org/en/download/package-manager/#debian-and-ubuntu-based-linux-distributions)
+  * Install NodeJS 6.x (actual LTS): [https://nodejs.org/en/download/package-manager/#debian-and-ubuntu-based-linux-distributions](https://nodejs.org/en/download/package-manager/#debian-and-ubuntu-based-linux-distributions)
   * Add jessie backports to your *source.list*: http://backports.debian.org/Instructions/
   * Run:
 
         # apt-get update
         # apt-get install ffmpeg postgresql-9.4 openssl
-        # npm install -g npm@3
 
 #### Other distribution... (PR welcome)
 
diff --git a/scripts/upgrade.sh b/scripts/upgrade.sh
index 022e76107..59deae1eb 100755
--- a/scripts/upgrade.sh
+++ b/scripts/upgrade.sh
@@ -1,13 +1,25 @@
 #!/usr/bin/env sh
 
+nodeMinVersion="v6.0.0"
+npmMinVersion="3.0.0"
 
-git pull origin $(git rev-parse --abbrev-ref HEAD) || exit -1
+if [[ $(node --version) < $nodeMinVersion ]]; then
+  echo 'You need node >= 6'
+  exit 0
+fi
+
+if [[ $(npm --version) < $npmMinVersion ]]; then
+  echo 'You need npm >= 3'
+  exit 0
+fi
 
 if pgrep peertube > /dev/null; then
   echo 'PeerTube is running!'
   exit 0
 fi
 
+git pull origin $(git rev-parse --abbrev-ref HEAD) || exit -1
+
 npm install
 npm update
 cd client && npm update && cd ../