diff --git a/response.go b/response.go
index a510556..61f471e 100644
--- a/response.go
+++ b/response.go
@@ -93,8 +93,8 @@ func (or *Response) readSGMLHeaders(r *bufio.Reader) error {
 				return errors.New("OFX VERSION > 160 in SGML header")
 			}
 		case "SECURITY":
-			if headerValue != "NONE" {
-				return errors.New("OFX SECURITY header not NONE")
+			if !(headerValue == "NONE" || headerValue == "TYPE1") {
+				return errors.New("OFX SECURITY header must be NONE or TYPE1")
 			}
 		case "COMPRESSION":
 			if headerValue != "NONE" {
diff --git a/samples/valid_responses/moneymrkt1_v103_TYPE1.ofx b/samples/valid_responses/moneymrkt1_v103_TYPE1.ofx
new file mode 100644
index 0000000..4665a4e
--- /dev/null
+++ b/samples/valid_responses/moneymrkt1_v103_TYPE1.ofx
@@ -0,0 +1,75 @@
+OFXHEADER:100
+DATA:OFXSGML
+VERSION:103
+SECURITY:TYPE1
+ENCODING:USASCII
+CHARSET:1252
+COMPRESSION:NONE
+OLDFILEUID:NONE
+NEWFILEUID:NONE
+
+<OFX>
+<SIGNONMSGSRSV1><SONRS>
+<STATUS>
+<CODE>0
+<SEVERITY>INFO
+</STATUS>
+<DTSERVER>20170407001840.607[0:GMT]
+<LANGUAGE>ENG
+<FI>
+<ORG>UJKDO
+<FID>3534
+</FI>
+</SONRS>
+</SIGNONMSGSRSV1>
+<BANKMSGSRSV1>
+<STMTTRNRS>
+<TRNUID>e1707dfd-695d-4451-8d9c-0e142fdc456a
+<STATUS>
+<CODE>0
+<SEVERITY>INFO
+</STATUS>
+<STMTRS>
+<CURDEF>USD
+<BANKACCTFROM>
+<BANKID>598813374
+<ACCTID>35342483513
+<ACCTTYPE>MONEYMRKT
+</BANKACCTFROM>
+<BANKTRANLIST>
+<DTSTART>20170107011841.262[0:GMT]
+<DTEND>20170407001841.262[0:GMT]
+<STMTTRN>
+<TRNTYPE>CREDIT
+<DTPOSTED>20170117120000.000[0:GMT]
+<TRNAMT>-995.4190396554627
+<FITID>2fb2640c-cee3-4643-8ba3-ea21a4d18954
+<NAME>Dividend Earned
+</STMTTRN>
+<STMTTRN>
+<TRNTYPE>CREDIT
+<DTPOSTED>20170215120000.000[0:GMT]
+<TRNAMT>788.5385340523635
+<FITID>c9d856df-339c-47c6-9f6a-8c2e2910f62e
+<NAME>Dividend Earned
+</STMTTRN>
+<STMTTRN>
+<TRNTYPE>CREDIT
+<DTPOSTED>20170315120000.000[0:GMT]
+<TRNAMT>3070.1328011762807
+<FITID>1107ace0-048b-4c0c-b5f3-45b6be4cd71d
+<NAME>Dividend Earned
+</STMTTRN>
+</BANKTRANLIST>
+<LEDGERBAL>
+<BALAMT>2607.1664944585727
+<DTASOF>20170407001841.262[0:GMT]
+</LEDGERBAL>
+<AVAILBAL>
+<BALAMT>4503.683156768119
+<DTASOF>20170407001841.262[0:GMT]
+</AVAILBAL>
+</STMTRS>
+</STMTTRNRS>
+</BANKMSGSRSV1>
+</OFX>
\ No newline at end of file