diff --git a/pull_request_template.md b/pull_request_template.md
new file mode 100644
index 0000000..fab9f6f
--- /dev/null
+++ b/pull_request_template.md
@@ -0,0 +1,23 @@
+## Problem
+- *Description of why you made this PR*
+
+## Solution
+- *And how do you fix that problem*
+
+## PR Status
+- [ ] Code finished.
+- [ ] Tested with Package_check.
+- [ ] Fix or enhancement tested.
+- [ ] Upgrade from last version tested.
+- [ ] Can be reviewed and tested.
+
+## Validation
+---
+- [ ] **Code review**
+- [ ] **Approval (LGTM)**  
+*Code review and approval have to be from a member of @YunoHost/apps group*
+- **CI succeeded** : 
+[![Build Status](https://ci-apps-hq.yunohost.org/jenkins/job/wikijs_ynh%20-BRANCH-/badge/icon)](https://ci-apps-hq.yunohost.org/jenkins/job/wikijs_ynh%20-BRANCH-/)  
+*Please replace '-BRANCH-' in this link by the name of the branch used.*  
+*If the PR is from a forked repository. Please provide public results from package_check.*  
+When the PR is marked as ready to merge, you have to wait for 3 days before really merging it.
diff --git a/scripts/_common.sh b/scripts/_common.sh
index b905339..c0220ac 100644
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -1,5 +1,12 @@
 #!/bin/bash
 
+#=================================================
+# COMMON VARIABLES
+#=================================================
+
+# dependencies used by the app
+pkg_dependencies="postgresql postgresql-contrib"
+
 #=================================================
 # PERSONAL HELPERS
 #=================================================
diff --git a/scripts/install b/scripts/install
index 7bb2dc4..f8905de 100644
--- a/scripts/install
+++ b/scripts/install
@@ -103,7 +103,7 @@ ynh_print_info "Installing dependencies..."
 
 
 ynh_install_nodejs 10
-ynh_install_app_dependencies postgresql postgresql-contrib
+ynh_install_app_dependencies $pkg_dependencies
 
 #=================================================
 # CREATE A POSTGRESQL DATABASE
diff --git a/scripts/restore b/scripts/restore
index d8a7e27..0aa56fc 100644
--- a/scripts/restore
+++ b/scripts/restore
@@ -91,7 +91,7 @@ ynh_print_info "Reinstalling dependencies..."
 
 ynh_install_nodejs 10
 
-ynh_install_app_dependencies postgresql postgresql-contrib
+ynh_install_app_dependencies $pkg_dependencies
 
 #=================================================
 # RESTORE THE POSTGRESQL DATABASE
diff --git a/scripts/upgrade b/scripts/upgrade
index 728a76c..72f07e2 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -112,7 +112,7 @@ ynh_print_info "Upgrading dependencies..."
 
 ynh_install_nodejs 10
 
-ynh_install_app_dependencies postgresql postgresql-contrib
+ynh_install_app_dependencies $pkg_dependencies
 
 #=================================================
 # CREATE DEDICATED USER