diff --git a/runner/runner.go b/runner/runner.go
index cb53037..8d1a7a9 100644
--- a/runner/runner.go
+++ b/runner/runner.go
@@ -13,6 +13,8 @@ import (
 	"sync"
 	"syscall"
 
+	"net/url"
+
 	"github.com/knq/chromedp/client"
 )
 
@@ -379,6 +381,11 @@ func Proxy(proxy string) CommandLineOption {
 	return Flag("proxy-server", proxy)
 }
 
+// ProxyPacURL is the Chrome command line option to set the URL of a proxy PAC file.
+func ProxyPacURL(pacURL url.URL) CommandLineOption {
+	return Flag("proxy-pac-url", pacURL.String())
+}
+
 // WindowSize is the Chrome command line option to set the initial window size.
 func WindowSize(width, height int) CommandLineOption {
 	return Flag("window-size", fmt.Sprintf("%d,%d", width, height))