diff --git a/scripts/upgrade b/scripts/upgrade
index d6af6d9..c58435c 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -17,7 +17,7 @@ ynh_script_progression --message="Ensuring downward compatibility..."  --weight=
 # Move sources to subdir
 if [ ! -d "$install_dir/sources" ]; then
     mkdir "$install_dir/sources"
-    find . -mindepth 1 -maxdepth 1 ! -name "sources" -exec mv -t sources "{}" +
+    find . -mindepth 1 -maxdepth 1 ! -name "sources" -exec mv -t "$install_dir/sources" "{}" +
 fi
 
 #=================================================