diff --git a/core/src/main/resources/store/trader.xsd b/core/src/main/resources/store/trader.xsd
index fc86530..45102df 100644
--- a/core/src/main/resources/store/trader.xsd
+++ b/core/src/main/resources/store/trader.xsd
@@ -167,6 +167,7 @@
             <xs:enumeration value="ANTAL"/>
             <xs:enumeration value="HUDSON"/>
             <xs:enumeration value="TORVAL"/>
+            <xs:enumeration value="GROM"/>
             <xs:enumeration value="NONE"/>
         </xs:restriction>
     </xs:simpleType>