diff --git a/conf/nginx.conf b/conf/nginx.conf
index f9ce2b6..f8ed873 100644
--- a/conf/nginx.conf
+++ b/conf/nginx.conf
@@ -4,29 +4,23 @@ location __PATH__/ {
   # Path to source
   alias __FINALPATH__/ ;
 
-   # Force usage of https
+  # Force usage of https
   if ($scheme = http) {
     rewrite ^ https://$server_name$request_uri? permanent;
   }
 
-  index index.php;
-  if (!-f $request_filename) {
-            rewrite ^ __PATH__/index.php last;
-        }
+  index index.html index.php;
 
-  # Common parameter to increase upload size limit in conjunction with dedicated php-fpm file
-  client_max_body_size 50M;
-  try_files $uri $uri/ index.php$is_args$args;
+  try_files $uri $uri/ /index.php?q=$uri&$args;
 
   location ~ [^/]\.php(/|$) {
     fastcgi_split_path_info ^(.+?\.php)(/.*)$;
     fastcgi_pass unix:/var/run/php/php__PHPVERSION__-fpm-__NAME__.sock;
 
-    fastcgi_index index.php;
-    include fastcgi_params;
-    fastcgi_param REMOTE_USER $remote_user;
-    fastcgi_param PATH_INFO $fastcgi_path_info;
-    fastcgi_param SCRIPT_FILENAME $request_filename;
+    fastcgi_index              index.php;
+    fastcgi_param REMOTE_USER  $remote_user;
+    fastcgi_param PATH_INFO    $fastcgi_path_info;
+    include                    fastcgi_params;
   }
 
   # Include SSOWAT user panel.
diff --git a/scripts/_common.sh b/scripts/_common.sh
index 61ca47e..52200fa 100644
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -20,6 +20,43 @@ extra_php_dependencies="php${YNH_PHP_VERSION}-cli php${YNH_PHP_VERSION}-gettext
 # EXPERIMENTAL HELPERS
 #=================================================
 
+# Check available space before creating a temp directory.
+#
+# usage: ynh_smart_mktemp --min_size="Min size"
+#
+# | arg: -s, --min_size= - Minimal size needed for the temporary directory, in Mb
+ynh_smart_mktemp () {
+        # Declare an array to define the options of this helper.
+        declare -Ar args_array=( [s]=min_size= )
+        local min_size
+        # Manage arguments with getopts
+        ynh_handle_getopts_args "$@"
+
+        min_size="${min_size:-300}"
+        # Transform the minimum size from megabytes to kilobytes
+        min_size=$(( $min_size * 1024 ))
+
+        # Check if there's enough free space in a directory
+        is_there_enough_space () {
+                local free_space=$(df --output=avail "$1" | sed 1d)
+                test $free_space -ge $min_size
+        }
+
+        if is_there_enough_space /tmp; then
+                local tmpdir=/tmp
+        elif is_there_enough_space /var; then
+                local tmpdir=/var
+        elif is_there_enough_space /; then
+                local tmpdir=/   
+        elif is_there_enough_space /home; then
+                local tmpdir=/home
+        else
+                ynh_die "Insufficient free space to continue..."
+        fi
+
+        echo "$(mktemp --directory --tmpdir="$tmpdir")"
+}
+
 #=================================================
 # FUTURE OFFICIAL HELPERS
 #=================================================
diff --git a/scripts/upgrade b/scripts/upgrade
index c745b06..25bb381 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -21,6 +21,12 @@ path_url=$(ynh_app_setting_get   --app=$app --key=path)
 is_public=$(ynh_app_setting_get  --app=$app --key=is_public)
 final_path=$(ynh_app_setting_get --app=$app --key=final_path)
 
+#=================================================
+# CHECK VERSION
+#=================================================
+
+upgrade_type=$(ynh_check_app_version_changed)
+
 #=================================================
 # ENSURE DOWNWARD COMPATIBILITY
 #=================================================