diff --git a/manifest.toml b/manifest.toml
index 29a30ee..ee49d7d 100644
--- a/manifest.toml
+++ b/manifest.toml
@@ -59,6 +59,12 @@ ram.runtime = "50M"
     choices = [ "none", "mysql", "postgresql" ]
     default = "none"
 
+    [install.custom_error_file]
+    ask = "Activate the custom error file use"
+    type = "boolean"
+    default = false
+    help = "Once custom error enabled, you can add/create a custom `404.html` file in a directory `www/error`."
+
 [resources]
     [resources.system_user]
 
diff --git a/scripts/install b/scripts/install
index 836605b..f039e84 100644
--- a/scripts/install
+++ b/scripts/install
@@ -67,9 +67,11 @@ then
     YNH_PHP_VERSION="$phpversion"
 fi
 
-# Add the custom error build with the application
-ynh_add_config --template="nginx-code-error.conf" --destination="$nginx_extra_conf_dir/error-code.conf"
-ynh_app_setting_set --app=$app --key=custom_error_file --value="true"
+if [ $custom_error_file -eq 1 ]
+then
+    # Add the custom error build with the application
+    ynh_add_config --template="nginx-code-error.conf" --destination="$nginx_extra_conf_dir/error-code.conf"
+fi
 
 
 # Create a dedicated NGINX config
diff --git a/scripts/upgrade b/scripts/upgrade
index 31f947a..a0852cc 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -70,7 +70,7 @@ fi
 
 # If custom_error_file doesn't exist, create it.
 if [ -z "${custom_error_file:-}" ]; then
-	custom_error_file=1
+	custom_error_file=0
 	ynh_app_setting_set --app=$app --key=custom_error_file --value=$custom_error_file
 fi