diff --git a/scripts/upgrade b/scripts/upgrade
index f508d3f..df854d0 100755
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -93,6 +93,9 @@ ynh_add_nginx_config
 # VERSION TO THE NEXT ONE
 #=================================================
 
+current_version=$(grep OC_VersionString "$install_dir/version.php" | cut -d\' -f2)
+current_major_version=${current_version%%.*}
+
 # Define a function to execute commands with `occ`
 exec_occ() {
     # Backward compatibility to upgrade from older versions