diff --git a/conf/app.src b/conf/app.src
index 4558109..fbbad2e 100644
--- a/conf/app.src
+++ b/conf/app.src
@@ -1,6 +1,5 @@
-SOURCE_URL=https://github.com/jgraph/drawio/archive/v14.9.7.tar.gz
-SOURCE_SUM=d102106ccd61763a6b71ac3119573e5f39d1bd1a268686c3ad8455dc41181dfc
+SOURCE_URL=https://github.com/jgraph/drawio/archive/v15.6.8.tar.gz
+SOURCE_SUM=f8e73c988c8875ab8cd102ebacfa46b6267b9e77215a1cd6510fa1ee138d8293
 SOURCE_SUM_PRG=sha256sum
 SOURCE_FORMAT=tar.gz
 SOURCE_IN_SUBDIR=true
-SOURCE_FILENAME=
diff --git a/manifest.json b/manifest.json
index 9b1bc48..4fc9a9a 100644
--- a/manifest.json
+++ b/manifest.json
@@ -6,7 +6,7 @@
         "en": "Online diagram software for making flowcharts, process diagrams, org charts, UML, ER and network diagrams.",
         "fr": "Application en ligne qui permet de faire des schémas et du dessin vectoriel."
     },
-    "version": "14.9.7~ynh1",
+    "version": "15.6.8~ynh1",
     "url": "https://www.diagrams.net/",
     "upstream": {
         "license": "Apache-2.0",
@@ -31,8 +31,7 @@
         "install" : [
             {
                 "name": "domain",
-                "type": "domain",
-                "example": "example.com"
+                "type": "domain"
             },
             {
                 "name": "path",
diff --git a/scripts/_common.sh b/scripts/_common.sh
index eea5970..944a65e 100644
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -4,9 +4,6 @@
 # COMMON VARIABLES
 #=================================================
 
-# dependencies used by the app
-#pkg_dependencies="deb1 deb2"
-
 #=================================================
 # PERSONAL HELPERS
 #=================================================
diff --git a/scripts/install b/scripts/install
index 91f9080..4ce66da 100644
--- a/scripts/install
+++ b/scripts/install
@@ -83,7 +83,6 @@ ynh_add_nginx_config
 
 # Add "offline" parameter in index.html
 # See https://desk.draw.io/support/solutions/articles/16000042546-what-url-parameters-are-supported-
-#     and https://shelter.moe/@Neil/103928506546498078 [French]
 sed_pattern="s/var params = window.location.search.slice(1).split('&');/&\n\t\t\tparams.push(\"offline=1\");/g"
 sed -i "$sed_pattern" "$final_path/src/main/webapp/index.html"
 
diff --git a/scripts/upgrade b/scripts/upgrade
index 667569e..6b35514 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -26,18 +26,6 @@ final_path=$(ynh_app_setting_get --app=$app --key=final_path)
 
 upgrade_type=$(ynh_check_app_version_changed)
 
-#=================================================
-# ENSURE DOWNWARD COMPATIBILITY
-#=================================================
-ynh_script_progression --message="Ensuring downward compatibility..." --weight=1
-
-# Cleaning legacy permissions
-if ynh_legacy_permissions_exists; then
-	ynh_legacy_permissions_delete_all
-
-	ynh_app_setting_delete --app=$app --key=is_public
-fi
-
 #=================================================
 # BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
 #=================================================
@@ -52,6 +40,18 @@ ynh_clean_setup () {
 # Exit if an error occurs during the execution of the script
 ynh_abort_if_errors
 
+#=================================================
+# ENSURE DOWNWARD COMPATIBILITY
+#=================================================
+ynh_script_progression --message="Ensuring downward compatibility..." --weight=1
+
+# Cleaning legacy permissions
+if ynh_legacy_permissions_exists; then
+	ynh_legacy_permissions_delete_all
+
+	ynh_app_setting_delete --app=$app --key=is_public
+fi
+
 #=================================================
 # CREATE DEDICATED USER
 #=================================================
@@ -75,7 +75,6 @@ then
 
 	# Add "offline" parameter in index.html
 	# See https://desk.draw.io/support/solutions/articles/16000042546-what-url-parameters-are-supported-
-	#     and https://shelter.moe/@Neil/103928506546498078 [French]
 	sed_pattern="s/var params = window.location.search.slice(1).split('&');/&\n\t\t\tparams.push(\"offline=1\");/g"
 	sed -i "$sed_pattern" "$final_path/src/main/webapp/index.html"
 fi