diff --git a/scripts/upgrade b/scripts/upgrade
index 626454a..e31c9bd 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -83,7 +83,7 @@ then
 	ynh_setup_source --dest_dir="$final_path"
 
 	cp -a "$tmpdir/data" "$final_path/"
-	cp -a "$tmpdir/tpl" "$final_path/"
+	cp -a -n "$tmpdir/tpl" "$final_path/" # copy without erasing existing templates (from official source)
 
 	# Remove the tmp directory securely
 	ynh_secure_remove --file="$tmpdir"