diff --git a/alethzero/DappHost.cpp b/alethzero/DappHost.cpp
index fd73c1b17..3b0661ad1 100644
--- a/alethzero/DappHost.cpp
+++ b/alethzero/DappHost.cpp
@@ -28,7 +28,11 @@
 using namespace dev;
 
 DappHost::DappHost(int _port, int _threads):
-	m_port(_port), m_threads(_threads), m_running(false), m_daemon(nullptr)
+	m_port(_port),
+	m_url(QString("http://localhost:%1/").arg(m_port)),
+	m_threads(_threads),
+	m_running(false),
+	m_daemon(nullptr)
 {
 	startListening();
 }
@@ -135,5 +139,10 @@ QUrl DappHost::hostDapp(Dapp&& _dapp)
 	for (ManifestEntry const& entry: m_dapp.manifest.entries)
 		m_entriesByPath[QString::fromStdString(entry.path)] = &entry;
 
-	return QUrl(QString("http://localhost:%1/").arg(m_port));
+	return m_url;
+}
+
+bool DappHost::servesUrl(QUrl const& _url) const
+{
+	return m_url == _url || m_url.isParentOf(_url);
 }
diff --git a/alethzero/DappHost.h b/alethzero/DappHost.h
index 985bd34d9..50dff741d 100644
--- a/alethzero/DappHost.h
+++ b/alethzero/DappHost.h
@@ -40,6 +40,9 @@ public:
 	/// Load and host a dapp. Previsous dapp in discarded. Synchronous
 	QUrl hostDapp(Dapp&& _dapp);
 
+	/// @returns true if the given url is served from this DappHost.
+	bool servesUrl(QUrl const& _url) const;
+
 private:
 	void startListening();
 	void stopListening();
@@ -48,7 +51,8 @@ private:
 	void sendResponse(std::string const& _url, MHD_Connection* _connection);
 	static int callback(void* _cls, MHD_Connection* _connection, char const* _url, char const* _method, char const* _version, char const* _uploadData, size_t* _uploadDataSize, void** _conCls);
 
-	int m_port;
+	int const m_port;
+	QUrl const m_url;
 	int m_threads;
 	bool m_running;
 	MHD_Daemon* m_daemon;
diff --git a/alethzero/MainWin.cpp b/alethzero/MainWin.cpp
index dd3d5bbd3..e48b58283 100644
--- a/alethzero/MainWin.cpp
+++ b/alethzero/MainWin.cpp
@@ -232,6 +232,11 @@ Main::Main(QWidget *parent) :
 	{
 		ui->tabWidget->setTabText(0, ui->webView->title());
 	});
+	connect(ui->webView, &QWebEngineView::urlChanged, [=](QUrl const& _url)
+	{
+		if (!m_dappHost->servesUrl(_url))
+			ui->urlEdit->setText(_url.toString());
+	});
 
 	m_dappHost.reset(new DappHost(8081));
 	m_dappLoader = new DappLoader(this, web3(), getNameReg());