diff --git a/src/main/resources/com/solab/iso8583/parse/j8583.dtd b/src/main/resources/com/solab/iso8583/parse/j8583.dtd
index 6c42842..c98c93f 100644
--- a/src/main/resources/com/solab/iso8583/parse/j8583.dtd
+++ b/src/main/resources/com/solab/iso8583/parse/j8583.dtd
@@ -16,4 +16,5 @@
 <!ELEMENT field ( #PCDATA|field )* >
 <!ATTLIST field num NMTOKEN #REQUIRED >
 <!ATTLIST field length NMTOKEN #IMPLIED >
+<!ATTLIST field tz NMTOKEN #IMPLIED >
 <!ATTLIST field type ( ALPHA | NUMERIC | AMOUNT | DATE4 | DATE10 | DATE12 | DATE14 | DATE_EXP | TIME | LLVAR | LLLVAR | BINARY | LLBIN | LLLBIN | LLLLVAR | LLLLBIN | exclude) #REQUIRED >