diff --git a/document/chart/main.go b/document/chart/main.go
index f8afd97..c1ebdb2 100644
--- a/document/chart/main.go
+++ b/document/chart/main.go
@@ -10,7 +10,7 @@ import (
 	"os"
 
 	"github.com/unidoc/unioffice/v2/common/license"
-	unipdflicense "github.com/unidoc/unipdf/v3/common/license"
+	unipdflicense "github.com/unidoc/unipdf/v4/common/license"
 
 	"github.com/disintegration/imaging"
 	"github.com/unidoc/unichart"
@@ -21,9 +21,9 @@ import (
 	"github.com/unidoc/unioffice/v2/measurement"
 	"github.com/unidoc/unioffice/v2/schema/soo/wml"
 
-	"github.com/unidoc/unipdf/v3/creator"
-	"github.com/unidoc/unipdf/v3/model"
-	"github.com/unidoc/unipdf/v3/render"
+	"github.com/unidoc/unipdf/v4/creator"
+	"github.com/unidoc/unipdf/v4/model"
+	"github.com/unidoc/unipdf/v4/render"
 )
 
 func init() {
diff --git a/document/convert_to_pdf/main.go b/document/convert_to_pdf/main.go
index 584045a..c50f223 100644
--- a/document/convert_to_pdf/main.go
+++ b/document/convert_to_pdf/main.go
@@ -9,7 +9,7 @@ import (
 	"log"
 	"os"
 
-	unipdflicense "github.com/unidoc/unipdf/v3/common/license"
+	unipdflicense "github.com/unidoc/unipdf/v4/common/license"
 
 	"github.com/unidoc/unioffice/v2/common/license"
 	"github.com/unidoc/unioffice/v2/document"
diff --git a/document/convert_to_pdf_fonts/main.go b/document/convert_to_pdf_fonts/main.go
index 12dcb2c..e18fc20 100644
--- a/document/convert_to_pdf_fonts/main.go
+++ b/document/convert_to_pdf_fonts/main.go
@@ -9,8 +9,8 @@ import (
 	"log"
 	"os"
 
-	unipdflicense "github.com/unidoc/unipdf/v3/common/license"
-	"github.com/unidoc/unipdf/v3/model"
+	unipdflicense "github.com/unidoc/unipdf/v4/common/license"
+	"github.com/unidoc/unipdf/v4/model"
 
 	"github.com/unidoc/unioffice/v2/common/license"
 	"github.com/unidoc/unioffice/v2/document"
diff --git a/document/convert_to_pdf_options/main.go b/document/convert_to_pdf_options/main.go
index e02a7e6..6ee247e 100644
--- a/document/convert_to_pdf_options/main.go
+++ b/document/convert_to_pdf_options/main.go
@@ -9,7 +9,7 @@ import (
 	"log"
 	"os"
 
-	unipdflicense "github.com/unidoc/unipdf/v3/common/license"
+	unipdflicense "github.com/unidoc/unipdf/v4/common/license"
 
 	"github.com/unidoc/unioffice/v2/common/license"
 	"github.com/unidoc/unioffice/v2/document"
diff --git a/document/doc-to-pdf-fonts/main.go b/document/doc-to-pdf-fonts/main.go
index 12dcb2c..e18fc20 100644
--- a/document/doc-to-pdf-fonts/main.go
+++ b/document/doc-to-pdf-fonts/main.go
@@ -9,8 +9,8 @@ import (
 	"log"
 	"os"
 
-	unipdflicense "github.com/unidoc/unipdf/v3/common/license"
-	"github.com/unidoc/unipdf/v3/model"
+	unipdflicense "github.com/unidoc/unipdf/v4/common/license"
+	"github.com/unidoc/unipdf/v4/model"
 
 	"github.com/unidoc/unioffice/v2/common/license"
 	"github.com/unidoc/unioffice/v2/document"
diff --git a/document/doc-to-pdf/main.go b/document/doc-to-pdf/main.go
index 8bd952a..9dbadd0 100644
--- a/document/doc-to-pdf/main.go
+++ b/document/doc-to-pdf/main.go
@@ -9,7 +9,7 @@ import (
 	"log"
 	"os"
 
-	unipdflicense "github.com/unidoc/unipdf/v3/common/license"
+	unipdflicense "github.com/unidoc/unipdf/v4/common/license"
 
 	"github.com/unidoc/unioffice/v2/common/license"
 	"github.com/unidoc/unioffice/v2/document"
diff --git a/go.mod b/go.mod
index e0284a4..f0e8e20 100644
--- a/go.mod
+++ b/go.mod
@@ -6,8 +6,8 @@ require (
 	github.com/disintegration/imaging v1.6.2
 	github.com/go-ole/go-ole v1.3.0
 	github.com/unidoc/unichart v0.4.0
-	github.com/unidoc/unioffice/v2 v2.2.0
-	github.com/unidoc/unipdf/v3 v3.68.0
+	github.com/unidoc/unioffice/v2 v2.3.0
+	github.com/unidoc/unipdf/v4 v4.0.0
 )
 
 require (
diff --git a/go.sum b/go.sum
index 00eaf1a..79aea1a 100644
--- a/go.sum
+++ b/go.sum
@@ -53,10 +53,10 @@ github.com/unidoc/timestamp v0.0.0-20200412005513-91597fd3793a h1:RLtvUhe4DsUDl6
 github.com/unidoc/timestamp v0.0.0-20200412005513-91597fd3793a/go.mod h1:j+qMWZVpZFTvDey3zxUkSgPJZEX33tDgU/QIA0IzCUw=
 github.com/unidoc/unichart v0.4.0 h1:uXk9ZjbqzKb8Lt2Qv2oM9D2ftNRXvezPevgxQhsTQys=
 github.com/unidoc/unichart v0.4.0/go.mod h1:9QsE8RbS0fE7ndHNroeCEFkRPqqk47Qsoj6QSAtcwN0=
-github.com/unidoc/unioffice/v2 v2.2.0 h1:ItoaL4Yi4gzrGIo/U1mm2YAaGqpRuIJoFAhH3iBVcWY=
-github.com/unidoc/unioffice/v2 v2.2.0/go.mod h1:nVWakAntBDlyo/4nsztCy2Yk/bIxdwjiezlpmF3K9oE=
-github.com/unidoc/unipdf/v3 v3.68.0 h1:AM1wKukv75hvCtTbiPb3HSIdHS5RbmR6aYTCE0jiO+A=
-github.com/unidoc/unipdf/v3 v3.68.0/go.mod h1:4mQ4E8niuY+30TGxT1e/8aVoSk/nn0yCKfi+kYw98+I=
+github.com/unidoc/unioffice/v2 v2.3.0 h1:oZ5c49a4NnQUsmJkP67r9wbXBq2yrDsd4yb0enekNtQ=
+github.com/unidoc/unioffice/v2 v2.3.0/go.mod h1:Xw8klmfQMI0/g98nn3snEIeYaMgvFdyAJDd6ddwu4RI=
+github.com/unidoc/unipdf/v4 v4.0.0 h1:XxrrOMGLJ6HD7VBO6GpZL5wfoRDmLxawV+wkMXTuPeM=
+github.com/unidoc/unipdf/v4 v4.0.0/go.mod h1:SbSYFUoutyBR+hLlsHyNiCzzcSVVuG10S5Xu8RIJ6EY=
 github.com/unidoc/unitype v0.5.1 h1:UwTX15K6bktwKocWVvLoijIeu4JAVEAIeFqMOjvxqQs=
 github.com/unidoc/unitype v0.5.1/go.mod h1:3dxbRL+f1otNqFQIRHho8fxdg3CcUKrqS8w1SXTsqcI=
 golang.org/x/crypto v0.33.0 h1:IOBPskki6Lysi0lo9qQvbxiQ+FvsCC/YWOecCHAixus=
diff --git a/presentation/chart/main.go b/presentation/chart/main.go
index 21c1cb3..3cfa99c 100644
--- a/presentation/chart/main.go
+++ b/presentation/chart/main.go
@@ -13,10 +13,10 @@ import (
 
 	"github.com/unidoc/unichart"
 	"github.com/unidoc/unichart/dataset"
-	unipdflicense "github.com/unidoc/unipdf/v3/common/license"
-	"github.com/unidoc/unipdf/v3/creator"
-	"github.com/unidoc/unipdf/v3/model"
-	"github.com/unidoc/unipdf/v3/render"
+	unipdflicense "github.com/unidoc/unipdf/v4/common/license"
+	"github.com/unidoc/unipdf/v4/creator"
+	"github.com/unidoc/unipdf/v4/model"
+	"github.com/unidoc/unipdf/v4/render"
 
 	"github.com/unidoc/unioffice/v2/common"
 	"github.com/unidoc/unioffice/v2/common/license"
diff --git a/presentation/convert_to_pdf/main.go b/presentation/convert_to_pdf/main.go
index 6abdc1b..f4328d4 100644
--- a/presentation/convert_to_pdf/main.go
+++ b/presentation/convert_to_pdf/main.go
@@ -10,7 +10,7 @@ import (
 	"log"
 	"os"
 
-	unipdflicense "github.com/unidoc/unipdf/v3/common/license"
+	unipdflicense "github.com/unidoc/unipdf/v4/common/license"
 
 	"github.com/unidoc/unioffice/v2/common/license"
 	"github.com/unidoc/unioffice/v2/presentation"
diff --git a/spreadsheet/convert_to_pdf/main.go b/spreadsheet/convert_to_pdf/main.go
index f1abad4..53a18a7 100644
--- a/spreadsheet/convert_to_pdf/main.go
+++ b/spreadsheet/convert_to_pdf/main.go
@@ -11,7 +11,7 @@ import (
 	"github.com/unidoc/unioffice/v2/common/license"
 	"github.com/unidoc/unioffice/v2/spreadsheet"
 	"github.com/unidoc/unioffice/v2/spreadsheet/convert"
-	pdflicense "github.com/unidoc/unipdf/v3/common/license"
+	pdflicense "github.com/unidoc/unipdf/v4/common/license"
 )
 
 func init() {