diff --git a/modules/invoiceIn/back/models/invoice-in-tax.json b/modules/invoiceIn/back/models/invoice-in-tax.json
index 53b5548b63..256ee0553a 100644
--- a/modules/invoiceIn/back/models/invoice-in-tax.json
+++ b/modules/invoiceIn/back/models/invoice-in-tax.json
@@ -22,12 +22,11 @@
             "type": "number"
         },
         "expenseFk": {
-            "type": "number"
+            "type": "string"
         },
         "created": {
             "type": "date"
         }
-
     },
     "relations": {
         "invoiceIn": {
@@ -51,4 +50,4 @@
             "foreignKey": "transactionTypeSageFk"
         }
     }
-}
+}
\ No newline at end of file