diff --git a/go.mod b/go.mod
index ba041bb706..a732a05547 100644
--- a/go.mod
+++ b/go.mod
@@ -10,7 +10,7 @@ require (
 	github.com/xuri/nfp v0.0.0-20240318013403-ab9948c2c4a7
 	golang.org/x/crypto v0.31.0
 	golang.org/x/image v0.18.0
-	golang.org/x/net v0.32.0
+	golang.org/x/net v0.33.0
 	golang.org/x/text v0.21.0
 )
 
diff --git a/go.sum b/go.sum
index 559cbcc0a4..40e347c144 100644
--- a/go.sum
+++ b/go.sum
@@ -19,8 +19,8 @@ golang.org/x/crypto v0.31.0 h1:ihbySMvVjLAeSH1IbfcRTkD/iNscyz8rGzjF/E5hV6U=
 golang.org/x/crypto v0.31.0/go.mod h1:kDsLvtWBEx7MV9tJOj9bnXsPbxwJQ6csT/x4KIN4Ssk=
 golang.org/x/image v0.18.0 h1:jGzIakQa/ZXI1I0Fxvaa9W7yP25TqT6cHIHn+6CqvSQ=
 golang.org/x/image v0.18.0/go.mod h1:4yyo5vMFQjVjUcVk4jEQcU9MGy/rulF5WvUILseCM2E=
-golang.org/x/net v0.32.0 h1:ZqPmj8Kzc+Y6e0+skZsuACbx+wzMgo5MQsJh9Qd6aYI=
-golang.org/x/net v0.32.0/go.mod h1:CwU0IoeOlnQQWJ6ioyFrfRuomB8GKF6KbYXZVyeXNfs=
+golang.org/x/net v0.33.0 h1:74SYHlV8BIgHIFC/LrYkOGIwL19eTYXQ5wc6TBuO36I=
+golang.org/x/net v0.33.0/go.mod h1:HXLR5J+9DxmrqMwG9qjGCxZ+zKXxBru04zlTvWlWuN4=
 golang.org/x/text v0.21.0 h1:zyQAAkrwaneQ066sspRyJaG9VNi/YJ1NfzcGB3hZ/qo=
 golang.org/x/text v0.21.0/go.mod h1:4IBbMaMmOPCJ8SecivzSH54+73PCFmPWxNTLm+vZkEQ=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
diff --git a/xmlStyles.go b/xmlStyles.go
index 9e9deb5761..c23388abfe 100644
--- a/xmlStyles.go
+++ b/xmlStyles.go
@@ -159,14 +159,16 @@ type xlsxBorders struct {
 // border formats (left, right, top, bottom, diagonal). Color is optional. When
 // missing, 'automatic' is implied.
 type xlsxBorder struct {
-	DiagonalDown bool     `xml:"diagonalDown,attr,omitempty"`
-	DiagonalUp   bool     `xml:"diagonalUp,attr,omitempty"`
-	Outline      bool     `xml:"outline,attr,omitempty"`
-	Left         xlsxLine `xml:"left,omitempty"`
-	Right        xlsxLine `xml:"right,omitempty"`
-	Top          xlsxLine `xml:"top,omitempty"`
-	Bottom       xlsxLine `xml:"bottom,omitempty"`
-	Diagonal     xlsxLine `xml:"diagonal,omitempty"`
+	DiagonalDown bool      `xml:"diagonalDown,attr,omitempty"`
+	DiagonalUp   bool      `xml:"diagonalUp,attr,omitempty"`
+	Outline      bool      `xml:"outline,attr,omitempty"`
+	Left         xlsxLine  `xml:"left"`
+	Right        xlsxLine  `xml:"right"`
+	Top          xlsxLine  `xml:"top"`
+	Bottom       xlsxLine  `xml:"bottom"`
+	Diagonal     xlsxLine  `xml:"diagonal"`
+	Vertical     *xlsxLine `xml:"vertical"`
+	Horizontal   *xlsxLine `xml:"horizontal"`
 }
 
 // xlsxCellStyles directly maps the cellStyles element. This element contains