diff --git a/.github/actions/install/action.yml b/.github/actions/install/action.yml
index f78b307c..cd3999e8 100644
--- a/.github/actions/install/action.yml
+++ b/.github/actions/install/action.yml
@@ -13,7 +13,7 @@ inputs:
   zig-v8:
     description: 'zig v8 version to install'
     required: false
-    default: 'v0.3.9'
+    default: 'v0.4.0'
   v8:
     description: 'v8 version to install'
     required: false
diff --git a/Dockerfile b/Dockerfile
index 715441a0..fd872c45 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -3,7 +3,7 @@ FROM debian:stable-slim
 ARG MINISIG=0.12
 ARG ZIG_MINISIG=RWSGOq2NVecA2UPNdBUZykf1CCb147pkmdtYxgb3Ti+JO/wCYvhbAb/U
 ARG V8=14.0.365.4
-ARG ZIG_V8=v0.3.9
+ARG ZIG_V8=v0.4.0
 ARG TARGETPLATFORM
 
 RUN apt-get update -yq && \
diff --git a/build.zig.zon b/build.zig.zon
index 89590ac8..ea0517b4 100644
--- a/build.zig.zon
+++ b/build.zig.zon
@@ -5,8 +5,8 @@
     .minimum_zig_version = "0.15.2",
     .dependencies = .{
         .v8 = .{
-            .url = "https://github.com/lightpanda-io/zig-v8-fork/archive/refs/tags/v0.3.9.tar.gz",
-            .hash = "v8-0.0.0-xddH64iHBACfPm7oAqZerjmLLO6ftP4Yg5V7dtEGcD0i",
+            .url = "https://github.com/lightpanda-io/zig-v8-fork/archive/refs/tags/v0.4.0.tar.gz",
+            .hash = "v8-0.0.0-xddH61yIBAD04dV4CHW0qIFiqbOGvkN_-amGdmgbQ3dU",
         },
         // .v8 = .{ .path = "../zig-v8-fork" },
         .brotli = .{
diff --git a/src/browser/js/Inspector.zig b/src/browser/js/Inspector.zig
index d956cc52..0bc81872 100644
--- a/src/browser/js/Inspector.zig
+++ b/src/browser/js/Inspector.zig
@@ -128,6 +128,10 @@ pub fn contextCreated(
     }
 }
 
+pub fn getContextId(_: *const Inspector, local: *const js.Local) i32 {
+    return v8.v8__inspector__executionContextId(local.handle);
+}
+
 pub fn contextDestroyed(self: *Inspector, context: *const v8.Context) void {
     v8.v8_inspector__Inspector__ContextDestroyed(self.handle, context);
 
diff --git a/src/cdp/domains/page.zig b/src/cdp/domains/page.zig
index 02a899d1..ab7c8397 100644
--- a/src/cdp/domains/page.zig
+++ b/src/cdp/domains/page.zig
@@ -257,7 +257,22 @@ fn createIsolatedWorld(cmd: *CDP.Command) !void {
     const page = bc.session.currentPage() orelse return error.PageNotLoaded;
 
     const js_context = try world.createContext(page);
-    return cmd.sendResult(.{ .executionContextId = js_context.id }, .{});
+    const aux_data = try std.fmt.allocPrint(cmd.arena, "{{\"isDefault\":false,\"type\":\"isolated\",\"frameId\":\"{s}\"}}", .{params.frameId});
+
+    var ls: js.Local.Scope = undefined;
+    js_context.localScope(&ls);
+    defer ls.deinit();
+
+    bc.inspector_session.inspector.contextCreated(
+        &ls.local,
+        params.worldName,
+        page.origin orelse "",
+        aux_data,
+        false,
+    );
+
+    const context_id = bc.inspector_session.inspector.getContextId(&ls.local);
+    return cmd.sendResult(.{ .executionContextId = context_id }, .{});
 }
 
 fn navigate(cmd: *CDP.Command) !void {