diff --git a/build.sbt b/build.sbt
index 6ca27e42..b40e6ae5 100644
--- a/build.sbt
+++ b/build.sbt
@@ -70,7 +70,7 @@ lazy val wvlet =
     publishLocal := {}
   ).aggregate(wvletCore, wvletTest, wvletServer, wvletUi)
 
-val wvletLog = "org.wvlet" %% "wvlet-log" % "1.1"
+val wvletLog = "org.wvlet" %% "wvlet-log" % "1.2.1"
 
 lazy val wvletCore =
   Project(id = "wvlet-core", base = file("wvlet-core")).settings(
@@ -116,7 +116,7 @@ lazy val wvletServer =
       "com.twitter" %% "finatra-http" % "2.9.0",
       // sl4j -> wvlet-log bridge
       "org.slf4j" % "slf4j-jdk14" % "1.7.21",
-      "org.wvlet" %% "wvlet-log" % "1.2"
+      wvletLog
     )
   )
 
@@ -134,7 +134,7 @@ lazy val wvletUi =
       "com.lihaoyi" %%% "scalatags" % "0.6.3",
       "com.typesafe.play" %%% "play-json" % "2.6.0-M6",
       "in.nvilla" %%% "monadic-html" % "0.3.0",
-      "org.wvlet" %%% "wvlet-log" % "1.2.1-SNAPSHOT" changing()
+      "org.wvlet" %%% "wvlet-log" % "1.2.1"
     ),
     jsDependencies ++= Seq(
       "org.webjars" % "jquery" % "2.1.4" / "2.1.4/jquery.js",
diff --git a/wvlet-ui/src/main/scala/wvlet/ui/WvletUI.scala b/wvlet-ui/src/main/scala/wvlet/ui/WvletUI.scala
index 57f7cddb..adfa4c47 100644
--- a/wvlet-ui/src/main/scala/wvlet/ui/WvletUI.scala
+++ b/wvlet-ui/src/main/scala/wvlet/ui/WvletUI.scala
@@ -3,8 +3,6 @@ package wvlet.ui
 import org.scalajs.dom
 import org.scalajs.dom.document
 import play.api.libs.json._
-import wvlet.log.LogFormatter.SourceCodeLogFormatter
-import wvlet.log.LogTimestampFormatter.formatTimestamp
 import wvlet.ui.component.{LayoutFrame, Navbar}
 import wvlet.log._
 import wvlet.ui.view.html.navbar
@@ -12,21 +10,6 @@ import wvlet.ui.view.html.navbar
 import scala.scalajs.js
 import scalatags.JsDom.all._
 
-object UILogFormatter extends LogFormatter {
-  override def formatLog(r: LogRecord): String = {
-    val loc =
-      r.source
-      .map(source => s" - (${source.fileLoc})")
-      .getOrElse("")
-
-    val log = f"${formatTimestamp(r.getMillis)} ${r.level.name}%5s [${r.leafLoggerName}] ${r.getMessage} ${loc}"
-    r.cause match {
-      case Some(ex) => s"${log}\n${LogFormatter.formatStacktrace(ex)}"
-      case None => log
-    }
-  }
-}
-
 object WvletUI extends js.JSApp with LogSupport {
 
   case class FormData(
@@ -40,9 +23,17 @@ object WvletUI extends js.JSApp with LogSupport {
   implicit val projectReader = Json.reads[Project]
 
   Logger.setDefaultHandler(new JSConsoleLogHandler)
+  Logger.setDefaultLogLevel(LogLevel.ALL)
 
   def main() = {
-    Logger.setDefaultLogLevel(LogLevel.DEBUG)
+
+    info("info")
+    debug("debug")
+    trace("trace")
+    warn("warn")
+    error("error")
+
+
     info("Start WvletUI")
     val m = document.getElementById("main")
     val layout = LayoutFrame.render(<p>hello wvlet</p>)
diff --git a/wvlet-ui/src/main/scala/wvlet/ui/component/Navbar.scala b/wvlet-ui/src/main/scala/wvlet/ui/component/Navbar.scala
index a3621747..b3885b60 100644
--- a/wvlet-ui/src/main/scala/wvlet/ui/component/Navbar.scala
+++ b/wvlet-ui/src/main/scala/wvlet/ui/component/Navbar.scala
@@ -49,24 +49,6 @@ object Navbar extends RxElement with LogSupport {
     state.update(x => name)
   }
 
-  def body2 = state.map {page =>
-    <nav class="navbar navbar-toggleable-md navbar-inverse fixed-top bg-inverse">
-      <button class="navbar-toggler navbar-toggler-right" type="button" data-toggle="collapse" data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
-        <span class="navbar-toggler-icon"></span>
-      </button>
-      <a class="navbar-brand" href="#">wvlet</a>
-      <div class="collaplse navbar-collapse" id="navbarSupportedContent">
-        <div class="navbar-nav">{ links.map {l =>
-          val isActive = page == l.name
-          <a class={linkStyle(isActive)} href={l.url} onclick={onClick(l.name)}>
-            {icon(l.icon)} {l.name}
-          </a>
-        }}
-        </div>
-      </div>
-    </nav>
-  }
-
   def body = state.map {page =>
     <div class="mdl-layout__drawer">
       <span class="mdl-layout-title">wvlet</span>