diff --git a/src/cdp/cdp.zig b/src/cdp/cdp.zig
index 7853a804..a0d36918 100644
--- a/src/cdp/cdp.zig
+++ b/src/cdp/cdp.zig
@@ -88,6 +88,7 @@ pub fn do(
 }
 
 pub const State = struct {
+    contextID: ?[]const u8 = null,
     frameID: []const u8 = FrameID,
     url: []const u8 = URLBase,
     securityOrigin: []const u8 = URLBase,
diff --git a/src/cdp/target.zig b/src/cdp/target.zig
index 9f6136a0..5d5b4135 100644
--- a/src/cdp/target.zig
+++ b/src/cdp/target.zig
@@ -178,6 +178,8 @@ fn createBrowserContext(
     };
     const msg = try getMsg(alloc, Params, scanner);
 
+    ctx.state.contextID = ContextID;
+
     // output
     const Resp = struct {
         browserContextId: []const u8 = ContextID,