diff --git a/README.md b/README.md
index 5e3942f..494eeea 100644
--- a/README.md
+++ b/README.md
@@ -29,7 +29,7 @@ Zwii is a database-less (flat-file) CMS that allows you to easily create and man
 - Flexible
 
 
-**Shipped version:** 12.3.05~ynh1
+**Shipped version:** 12.3.05~ynh2
 
 ## Screenshots
 
diff --git a/README_fr.md b/README_fr.md
index 7fd103f..f667aeb 100644
--- a/README_fr.md
+++ b/README_fr.md
@@ -29,7 +29,7 @@ Zwii is a database-less (flat-file) CMS that allows you to easily create and man
 - Flexible
 
 
-**Version incluse :** 12.3.05~ynh1
+**Version incluse :** 12.3.05~ynh2
 
 ## Captures d’écran
 
diff --git a/doc/POST_UPGRADE.md b/doc/POST_UPGRADE.md
new file mode 100644
index 0000000..d242cf5
--- /dev/null
+++ b/doc/POST_UPGRADE.md
@@ -0,0 +1,19 @@
+## You need now to finalize the upgrade process of ZwiiCMS directly in the app.
+
+#### 1. Login with your admin account
+
+#### 2. Go to setup page
+
+![Setup menu](./upgrade_process_1.png)
+
+#### 3. Click on Reinstall
+
+![Reinstall](./upgrade_process_2.png)
+
+#### 4. If needed, deactivate the maintenance mode
+
+![Maintenance mode](./upgrade_process_3.png)
+
+#### 5. Save
+
+![Save](./upgrade_process_4.png)
diff --git a/doc/PRE_UPGRADE.md b/doc/PRE_UPGRADE.md
new file mode 100644
index 0000000..931aa61
--- /dev/null
+++ b/doc/PRE_UPGRADE.md
@@ -0,0 +1,6 @@
+## Disclaimers / important information
+By continuing the app will stay in **maintenance mode** until a manual finalization.
+
+The manual finalization process is easy. You just need to be able to access the webapp and login with your admin account.
+
+This process will be explain at the end of the upgarde proccess.
diff --git a/doc/upgrade_process_1.png b/doc/upgrade_process_1.png
new file mode 100644
index 0000000..c2e1d52
Binary files /dev/null and b/doc/upgrade_process_1.png differ
diff --git a/doc/upgrade_process_2.png b/doc/upgrade_process_2.png
new file mode 100644
index 0000000..334382e
Binary files /dev/null and b/doc/upgrade_process_2.png differ
diff --git a/doc/upgrade_process_3.png b/doc/upgrade_process_3.png
new file mode 100644
index 0000000..f119cfc
Binary files /dev/null and b/doc/upgrade_process_3.png differ
diff --git a/doc/upgrade_process_4.png b/doc/upgrade_process_4.png
new file mode 100644
index 0000000..bb844c5
Binary files /dev/null and b/doc/upgrade_process_4.png differ
diff --git a/manifest.toml b/manifest.toml
index b26b135..dfb2787 100644
--- a/manifest.toml
+++ b/manifest.toml
@@ -5,7 +5,7 @@ name = "ZwiiCMS"
 description.en = "Simple, lightweight, database-free, scalable and responsive CMS"
 description.fr = "CMS simple, léger, sans base de données, modulable et responsive"
 
-version = "12.3.05~ynh1"
+version = "12.3.05~ynh2"
 
 maintainers = ["ewilly"]
 
@@ -55,13 +55,6 @@ ram.runtime = "50M"
     type = "password"
     
 [resources]
-
-    [resources.sources]
-
-        [resources.sources.main]
-        url = "https://forge.chapril.org/ZwiiCMS-Team/ZwiiCMS/archive/12.3.04.tar.gz"
-        sha256 = "2c0d58dbbf1f036a230dd7825c235a0a118975064290f2c8e306714afbd5d4bc"
-
     [resources.system_user]
 
     [resources.install_dir]
diff --git a/scripts/upgrade b/scripts/upgrade
index db653a6..1f7ae2f 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -30,6 +30,13 @@ find "$install_dir" -type f -exec chmod 640 {} \;
 find "$install_dir" -type d -exec chmod 750 {} \;
 find "$install_dir" -type d -exec chmod +s {} \;
 
+#=================================================
+# UPDATE A CONFIG FILE
+#=================================================
+
+# Apply maintenance mode
+sed -i 's/"maintenance":[^,]*/"maintenance":true/g' "$install_dir/site/data/config.json"
+
 #=================================================
 # REAPPLY SYSTEM CONFIGURATIONS
 #=================================================