diff --git a/conf/upstream_version b/conf/upstream_version
index 22cafd0..17e774d 100644
--- a/conf/upstream_version
+++ b/conf/upstream_version
@@ -1 +1 @@
-1bc078ddfcbdfebb301b49fe87fd805b6cb89a5a
+670d3fa88f2e3c0f5cee1de14e7a1d5c113b106d
diff --git a/scripts/install b/scripts/install
index 61fe699..fe75546 100644
--- a/scripts/install
+++ b/scripts/install
@@ -65,11 +65,21 @@ fi
 sudo mv "$TMPDIR" "$final_path"
 
 # configure config file
+ # language 
 ynh_replace_string "default_language='en'" "default_language='$language'" "$bozon_conf"
-ynh_store_file_checksum "$bozon_conf"
+ 
+ # max upload file size
+case ${filesize: -1} in
+		g|G)
+			max_length=$((${filesize%?}*1024))
+			;;
+		*)
+			max_length=${filesize%?}
+			;;
+	esac
+ynh_replace_string "max_length=2048" "max_length=$max_length" "$bozon_conf"
 
-# update auto_dropzone.php
-myynh_update_bozon_auto_dropzone
+ynh_store_file_checksum "$bozon_conf"
 
 # create private & data folders
 myynh_create_dir "$final_path/private"
diff --git a/scripts/upgrade b/scripts/upgrade
index f87bc8c..636c5ed 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -75,8 +75,16 @@ fi
 sudo cp -a "$TMPDIR/." "$final_path"
 sudo rm -R "$TMPDIR"
 
-# update auto_dropzone.php
-myynh_update_bozon_auto_dropzone
+# update config.php with 'max_length' line
+case ${filesize: -1} in
+		g|G)
+			max_length=$((${filesize%?}*1024))
+			;;
+		*)
+			max_length=${filesize%?}
+			;;
+	esac
+sed -i "54i\$max_length=$max_length;" "$bozon_conf"
 
 # set permissions
 myynh_set_permissions