diff --git a/htdocs/install/mysql/migration/3.6.0-3.7.0.sql b/htdocs/install/mysql/migration/3.6.0-3.7.0.sql
index e8c77100bf9..0e77022abef 100755
--- a/htdocs/install/mysql/migration/3.6.0-3.7.0.sql
+++ b/htdocs/install/mysql/migration/3.6.0-3.7.0.sql
@@ -1121,3 +1121,12 @@ ALTER TABLE llx_extrafields ADD alwayseditable INTEGER DEFAULT 0 AFTER pos;
 -- add supplier webservice fields
 ALTER TABLE llx_societe ADD webservices_url varchar(255) DEFAULT NULL;
 ALTER TABLE llx_societe ADD webservices_key varchar(128) DEFAULT NULL;
+
+-- changes size of ref in commande_fourn and facture_fourn
+ALTER TABLE llx_commande_fournisseur MODIFY COLUMN ref VARCHAR(255);
+ALTER TABLE llx_commande_fournisseur MODIFY COLUMN ref_ext VARCHAR(255);
+ALTER TABLE llx_commande_fournisseur MODIFY COLUMN ref_supplier VARCHAR(255);
+
+ALTER TABLE llx_facture_fourn MODIFY COLUMN ref VARCHAR(255);
+ALTER TABLE llx_facture_fourn MODIFY COLUMN ref_ext VARCHAR(255);
+ALTER TABLE llx_facture_fourn MODIFY COLUMN ref_supplier VARCHAR(255);