diff --git a/cdp/network/types.go b/cdp/network/types.go
index c436bc5..24fa630 100644
--- a/cdp/network/types.go
+++ b/cdp/network/types.go
@@ -482,9 +482,10 @@ func (t InitiatorType) String() string {
 
 // InitiatorType values.
 const (
-	InitiatorTypeParser InitiatorType = "parser"
-	InitiatorTypeScript InitiatorType = "script"
-	InitiatorTypeOther  InitiatorType = "other"
+	InitiatorTypeParser  InitiatorType = "parser"
+	InitiatorTypeScript  InitiatorType = "script"
+	InitiatorTypePreload InitiatorType = "preload"
+	InitiatorTypeOther   InitiatorType = "other"
 )
 
 // MarshalEasyJSON satisfies easyjson.Marshaler.
@@ -504,6 +505,8 @@ func (t *InitiatorType) UnmarshalEasyJSON(in *jlexer.Lexer) {
 		*t = InitiatorTypeParser
 	case InitiatorTypeScript:
 		*t = InitiatorTypeScript
+	case InitiatorTypePreload:
+		*t = InitiatorTypePreload
 	case InitiatorTypeOther:
 		*t = InitiatorTypeOther
 
diff --git a/cmd/chromedp-gen/protocol.json b/cmd/chromedp-gen/protocol.json
index 009ed6c..b201788 100644
--- a/cmd/chromedp-gen/protocol.json
+++ b/cmd/chromedp-gen/protocol.json
@@ -2405,6 +2405,7 @@
               "enum": [
                 "parser",
                 "script",
+                "preload",
                 "other"
               ],
               "description": "Type of this initiator."