diff --git a/scripts/_common.sh b/scripts/_common.sh
index e1c9af8..4169852 100644
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -3,3 +3,8 @@
 # Common variables
 #
 
+if [ "$(lsb_release --codename --short)" == "jessie" ]; then
+	pkg_dependencies="php5-gd"
+else
+	pkg_dependencies="php-gd php-zip php-dom php-mbstring"
+fi
diff --git a/scripts/install b/scripts/install
index e74d620..c6be758 100644
--- a/scripts/install
+++ b/scripts/install
@@ -62,10 +62,6 @@ ynh_app_setting_set "$app" is_public "$is_public"
 # INSTALL DEPENDENCIES
 #=================================================
 
-pkg_dependencies="php-gd php-dom php-mbstring"
-if [ "$(lsb_release --codename --short)" != "jessie" ]; then
-	pkg_dependencies="$pkg_dependencies php-zip"
-fi
 ynh_install_app_dependencies $pkg_dependencies
 
 #=================================================
diff --git a/scripts/restore b/scripts/restore
index 91af4a5..b37c685 100644
--- a/scripts/restore
+++ b/scripts/restore
@@ -55,10 +55,6 @@ test ! -d $final_path \
 #=================================================
 
 # Define and install dependencies
-pkg_dependencies=php5-gd
-if [ "$(lsb_release --codename --short)" != "jessie" ]; then
-	pkg_dependencies="$pkg_dependencies php-zip"
-fi
 ynh_install_app_dependencies $pkg_dependencies
 
 #=================================================
diff --git a/scripts/upgrade b/scripts/upgrade
index 8ad431d..992d464 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -120,10 +120,6 @@ ynh_add_fpm_config
 # INSTALL DEPENDENCIES
 #=================================================
 
-pkg_dependencies=php5-gd
-if [ "$(lsb_release --codename --short)" != "jessie" ]; then
-	pkg_dependencies="$pkg_dependencies php-zip"
-fi
 ynh_install_app_dependencies $pkg_dependencies
 
 #=================================================