diff --git a/core/config.go b/core/config.go
index d28eebc..3faaf05 100644
--- a/core/config.go
+++ b/core/config.go
@@ -104,9 +104,5 @@ func init() {
 
 // Register create self pdf config
 func Register(size string, config *Config) {
-	if _, ok := defaultConfigs[size]; ok {
-		panic("config size has exist")
-	}
-
 	defaultConfigs[size] = config
 }
diff --git a/core/report.go b/core/report.go
index 49947b0..fe6f660 100644
--- a/core/report.go
+++ b/core/report.go
@@ -314,7 +314,7 @@ func (report *Report) SetMargin(dx, dy float64) {
 	report.SetXY(x+dx, y+dy)
 }
 
-// 设置页面的尺寸, unit: mm pt in  size: A4 LTR, 目前支持常用的两种方式
+// 设置页面的尺寸, unit: mm pt in  size: A3 A4 LTR, 目前支持常用的两种方式
 func (report *Report) SetPage(size string, orientation string) {
 	unit := "pt"
 	config, ok := defaultConfigs[size]
@@ -323,6 +323,17 @@ func (report *Report) SetPage(size string, orientation string) {
 	}
 
 	switch size {
+	case "A3":
+		switch orientation {
+		case "P":
+			report.addAtomicCell("P|" + unit + "|A3|P")
+			report.pageWidth = config.width
+			report.pageHeight = config.height
+		case "L":
+			report.addAtomicCell("P|" + unit + "|A3|L")
+			report.pageWidth = config.height
+			report.pageHeight = config.width
+		}
 	case "A4":
 		switch orientation {
 		case "P":
diff --git a/go.mod b/go.mod
index ad4fd77..f81d0c4 100644
--- a/go.mod
+++ b/go.mod
@@ -3,7 +3,8 @@ module github.com/zhyocean/gopdf
 go 1.13
 
 require (
-	github.com/dlclark/regexp2 v1.2.0
-	github.com/signintech/gopdf v0.9.16
-	golang.org/x/image v0.0.0-20200801110659-972c09e46d76
+	github.com/dlclark/regexp2 v1.7.0
+	github.com/pkg/errors v0.9.1 // indirect
+	github.com/signintech/gopdf v0.15.0
+	golang.org/x/image v0.0.0-20220902085622-e7cb96979f69
 )
diff --git a/go.sum b/go.sum
index bd2b204..08fa2ea 100644
--- a/go.sum
+++ b/go.sum
@@ -1,13 +1,26 @@
 github.com/dlclark/regexp2 v1.2.0 h1:8sAhBGEM0dRWogWqWyQeIJnxjWO6oIjl8FKqREDsGfk=
 github.com/dlclark/regexp2 v1.2.0/go.mod h1:2pZnwuY/m+8K6iRw6wQdMtk+rH5tNGR1i55kozfMjCc=
+github.com/dlclark/regexp2 v1.7.0 h1:7lJfhqlPssTb1WQx4yvTHN0uElPEv52sbaECrAQxjAo=
+github.com/dlclark/regexp2 v1.7.0/go.mod h1:DHkYz0B9wPfa6wondMfaivmHpzrQ3v9q8cnmRbL6yW8=
 github.com/phpdave11/gofpdi v1.0.8 h1:9HRg0Z0qDfWeMU7ska+YNQ13RHxTxqP5KTg/dBl4o7c=
 github.com/phpdave11/gofpdi v1.0.8/go.mod h1:vBmVV0Do6hSBHC8uKUQ71JGW+ZGQq74llk/7bXwjDoI=
+github.com/phpdave11/gofpdi v1.0.11/go.mod h1:vBmVV0Do6hSBHC8uKUQ71JGW+ZGQq74llk/7bXwjDoI=
+github.com/phpdave11/gofpdi v1.0.13 h1:o61duiW8M9sMlkVXWlvP92sZJtGKENvW3VExs6dZukQ=
+github.com/phpdave11/gofpdi v1.0.13/go.mod h1:vBmVV0Do6hSBHC8uKUQ71JGW+ZGQq74llk/7bXwjDoI=
 github.com/pkg/errors v0.8.1 h1:iURUrRGxPUNPdy5/HRSm+Yj6okJ6UtLINN0Q9M4+h3I=
 github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
+github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
+github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/signintech/gopdf v0.9.8 h1:tafWEjYhorfHMl9JT9II43fvf5XhUwrjUKVNwQqqyJQ=
 github.com/signintech/gopdf v0.9.8/go.mod h1:MrARAC6LaOgbnV6vrC5885VuoWCXazhAqx8L8zmjYy4=
 github.com/signintech/gopdf v0.9.16 h1:QmOLj9mk1AWE8BXgTyRzWjJFVNjH95iW2o6WwvIPbdM=
 github.com/signintech/gopdf v0.9.16/go.mod h1:YSAgnGaC2bLUlciG/pbzpnzFg9qfhqdITEA9lKEHiI0=
+github.com/signintech/gopdf v0.15.0 h1:oZ3dJYUjGvZ/nOaXRFRZBbHVLH5IvjAliHFZVMiy7ZM=
+github.com/signintech/gopdf v0.15.0/go.mod h1:a+E8HlIuBwghPyoo7UaoB5UaL7zklDzmYVIAHoW/Rlw=
 golang.org/x/image v0.0.0-20200801110659-972c09e46d76 h1:U7GPaoQyQmX+CBRWXKrvRzWTbd+slqeSh8uARsIyhAw=
 golang.org/x/image v0.0.0-20200801110659-972c09e46d76/go.mod h1:FeLwcggjj3mMvU+oOTbSwawSJRM1uh48EjtB4UJZlP0=
+golang.org/x/image v0.0.0-20220902085622-e7cb96979f69 h1:Lj6HJGCSn5AjxRAH2+r35Mir4icalbqku+CLUtjnvXY=
+golang.org/x/image v0.0.0-20220902085622-e7cb96979f69/go.mod h1:doUCurBvlfPMKfmIpRIywoHmhN3VyhnoFDbvIEWF4hY=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
+golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
+golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=