diff --git a/drivers/139/meta.go b/drivers/139/meta.go
index 8e963d70..184c3e12 100644
--- a/drivers/139/meta.go
+++ b/drivers/139/meta.go
@@ -21,6 +21,7 @@ type Addition struct {
 	ReportRealSize       bool   `json:"report_real_size" type:"bool" default:"true" help:"Enable to report the real file size during upload"`
 	UseLargeThumbnail    bool   `json:"use_large_thumbnail" type:"bool" default:"false" help:"Enable to use large thumbnail for images"`
 	UseOldStreamUpload   bool   `json:"use_old_stream_upload" type:"bool" default:"false" help:"Enable to use old stream upload method (not support rapid upload)"`
+	ClientType           string `json:"client_type" type:"select" options:"web,pc" default:"web" help:"Client type reported to the personal cloud API. web (9) allows uploading files up to 50 GB; pc (13) raises the single file upload limit to 500 GB."`
 }
 
 var config = driver.Config{
diff --git a/drivers/139/util.go b/drivers/139/util.go
index 7d60db55..a53f99e9 100644
--- a/drivers/139/util.go
+++ b/drivers/139/util.go
@@ -843,6 +843,24 @@ func unicode(str string) string {
 	return textUnquoted
 }
 
+// Client types reported in the X-Yun-Client-Info header. The web client is the
+// default with a 50 GB single file upload limit, while the PC client raises the
+// limit to 500 GB.
+const (
+	yunClientTypeWeb = "9"
+	yunClientTypePC  = "13"
+)
+
+// yunClientInfo returns the X-Yun-Client-Info header value for the configured
+// client_type addition. Anything other than pc falls back to the web client.
+func (d *Yun139) yunClientInfo() string {
+	clientType := yunClientTypeWeb
+	if d.ClientType == "pc" {
+		clientType = yunClientTypePC
+	}
+	return "||" + clientType + "|7.14.0|chrome|120.0.0.0|||windows 10||zh-CN|||dW5kZWZpbmVk||"
+}
+
 func (d *Yun139) newRequest(url string, method string, callback base.ReqCallback, resp interface{}) ([]byte, error) {
 	req := base.RestyClient.R()
 	randStr := random.String(16)
@@ -878,7 +896,7 @@ func (d *Yun139) newRequest(url string, method string, callback base.ReqCallback
 		"X-Yun-Api-Version":    "v1",
 		"X-Yun-App-Channel":    "10000034",
 		"X-Yun-Channel-Source": "10000034",
-		"X-Yun-Client-Info":    "||13|7.14.0|chrome|120.0.0.0|||windows 10||zh-CN|||dW5kZWZpbmVk||",
+		"X-Yun-Client-Info":    d.yunClientInfo(),
 		"X-Yun-Module-Type":    "100",
 		"X-Yun-Svc-Type":       "1",
 	})
diff --git a/drivers/139/util_test.go b/drivers/139/util_test.go
index d4abdc4d..6514a042 100644
--- a/drivers/139/util_test.go
+++ b/drivers/139/util_test.go
@@ -42,6 +42,33 @@ func TestExtractFastLoginCookies(t *testing.T) {
 	}
 }
 
+func TestYunClientInfoClientType(t *testing.T) {
+	tests := []struct {
+		name       string
+		clientType string
+		want       string
+	}{
+		{
+			name: "default web client",
+			want: "||9|7.14.0|chrome|120.0.0.0|||windows 10||zh-CN|||dW5kZWZpbmVk||",
+		},
+		{
+			name:       "pc client",
+			clientType: "pc",
+			want:       "||13|7.14.0|chrome|120.0.0.0|||windows 10||zh-CN|||dW5kZWZpbmVk||",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			d := Yun139{Addition: Addition{ClientType: tt.clientType}}
+			if got := d.yunClientInfo(); got != tt.want {
+				t.Fatalf("yunClientInfo() = %q, want %q", got, tt.want)
+			}
+		})
+	}
+}
+
 func TestCredentialState(t *testing.T) {
 	tests := []struct {
 		name string