diff --git a/scripts/install b/scripts/install
index 8c561a2..4abb776 100755
--- a/scripts/install
+++ b/scripts/install
@@ -62,6 +62,9 @@ ynh_print_info "Installing dependencies..."
 
 ynh_add_repo --uri="http://repo.z-hub.io/z-push:/final/Debian_9.0/" --suite="/" --component="" --name="$app"
 ynh_pin_repo --package="*" --pin="origin \"repo.z-hub.io\"" --name="$app"
+mkdir -p "/etc/apt/trusted.gpg.d"
+wget -qO - http://repo.z-hub.io/z-push:/final/Debian_9.0/Release.key | apt-key --keyring /etc/apt/trusted.gpg.d/$app.gpg add -
+ynh_package_update
 
 ynh_install_app_dependencies $pkg_dependencies
 
diff --git a/scripts/restore b/scripts/restore
index 4e06800..1fafac2 100755
--- a/scripts/restore
+++ b/scripts/restore
@@ -77,6 +77,9 @@ ynh_print_info "Reinstalling dependencies..."
 
 ynh_add_repo --uri="http://repo.z-hub.io/z-push:/final/Debian_9.0/" --suite="/" --component="" --name="$app"
 ynh_pin_repo --package="*" --pin="origin \"repo.z-hub.io\"" --name="$app"
+mkdir -p "/etc/apt/trusted.gpg.d"
+wget -qO - http://repo.z-hub.io/z-push:/final/Debian_9.0/Release.key | apt-key --keyring /etc/apt/trusted.gpg.d/$app.gpg add -
+ynh_package_update
 
 ynh_install_app_dependencies $pkg_dependencies
 
diff --git a/scripts/upgrade b/scripts/upgrade
index 7fc71f9..1e28981 100755
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -84,6 +84,9 @@ ynh_print_info "Upgrading dependencies..."
 
 ynh_add_repo --uri="http://repo.z-hub.io/z-push:/final/Debian_9.0/" --suite="/" --component="" --name="$app"
 ynh_pin_repo --package="*" --pin="origin \"repo.z-hub.io\"" --name="$app"
+mkdir -p "/etc/apt/trusted.gpg.d"
+wget -qO - http://repo.z-hub.io/z-push:/final/Debian_9.0/Release.key | apt-key --keyring /etc/apt/trusted.gpg.d/$app.gpg add -
+ynh_package_update
 
 ynh_install_app_dependencies $pkg_dependencies