diff --git a/build.gradle b/build.gradle
index d2cb410..5e6e5e8 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,5 +1,5 @@
 buildscript {
-  ext.kotlin_version = '1.1.4'
+  ext.kotlin_version = '1.1.4-2'
 
   repositories {
     mavenCentral()
@@ -18,7 +18,7 @@ apply plugin: 'maven'
 apply plugin: 'maven-publish'
 
 group 'ch.grisu118.js'
-version '0.2.0'
+version '0.3.0'
 
 repositories {
   mavenCentral()
@@ -53,8 +53,8 @@ repositories {
 }
 
 bintray {
-  user = project.property('bintrayUser')
-  key = project.property('bintrayApiKey')
+  user = project.hasProperty('bintrayUser') ? project.property('bintrayUser') : ""
+  key = project.hasProperty('bintrayApiKey') ? project.property('bintrayApiKey'): ""
   publications = ['Bintray']
   pkg {
     repo = 'kotlin'
diff --git a/src/main/kotlin/ch/grisu118/js/api/Date.kt b/src/main/kotlin/ch/grisu118/js/api/Date.kt
new file mode 100644
index 0000000..7748146
--- /dev/null
+++ b/src/main/kotlin/ch/grisu118/js/api/Date.kt
@@ -0,0 +1,6 @@
+package ch.grisu118.js.api
+
+external class Date {
+  fun toISOString(): String
+  fun toTimeString(): String
+}
\ No newline at end of file
diff --git a/src/main/kotlin/ch/grisu118/js/logger/ALogger.kt b/src/main/kotlin/ch/grisu118/js/logger/ALogger.kt
new file mode 100644
index 0000000..2a0025e
--- /dev/null
+++ b/src/main/kotlin/ch/grisu118/js/logger/ALogger.kt
@@ -0,0 +1,37 @@
+package ch.grisu118.js.logger
+
+abstract class ALogger(protected val name: String, protected var level: Level) : ILogger {
+  override val isTrace: Boolean
+    get() = level >= Level.TRACE
+  override val isDebug: Boolean
+    get() = level >= Level.DEBUG
+  override val isInfo: Boolean
+    get() = level >= Level.INFO
+  override val isWarn: Boolean
+    get() = level >= Level.WARN
+  override val isError: Boolean
+    get() = level >= Level.ERROR
+
+  protected fun log(level: Level, message: Any?) {
+    val msg = LoggerConfig.replace(level = level, message = message, name = name)
+    when (level) {
+      Level.TRACE, Level.DEBUG -> console.log(msg)
+      Level.INFO -> console.info(msg)
+      Level.WARN -> console.warn(msg)
+      Level.ERROR -> console.error(msg)
+      else -> throw IllegalArgumentException("Invalid level $level")
+    }
+  }
+
+  protected fun log(level: Level, message: Any?, t: Throwable) {
+    val msg = LoggerConfig.replace(level = level, message = message, name = name)
+    when (level) {
+      Level.TRACE, Level.DEBUG -> console.log(msg, t)
+      Level.INFO -> console.info(msg, t)
+      Level.WARN -> console.warn(msg, t)
+      Level.ERROR -> console.error(msg, t)
+      else -> throw IllegalArgumentException("Invalid level $level")
+    }
+  }
+
+}
\ No newline at end of file
diff --git a/src/main/kotlin/ch/grisu118/js/logger/Logger.kt b/src/main/kotlin/ch/grisu118/js/logger/Logger.kt
index de42008..6f2a8f4 100644
--- a/src/main/kotlin/ch/grisu118/js/logger/Logger.kt
+++ b/src/main/kotlin/ch/grisu118/js/logger/Logger.kt
@@ -1,74 +1,64 @@
 package ch.grisu118.js.logger
 
-class Logger(private val name: String, private var level: Level) : ILogger {
-  override val isTrace: Boolean
-    get() = level >= Level.TRACE
-  override val isDebug: Boolean
-    get() = level >= Level.DEBUG
-  override val isInfo: Boolean
-    get() = level >= Level.INFO
-  override val isWarn: Boolean
-    get() = level >= Level.WARN
-  override val isError: Boolean
-    get() = level >= Level.ERROR
+class Logger(name: String, level: Level) : ALogger(name, level) {
 
   override fun trace(message: Any?) {
     if (isTrace) {
-      console.log("$level [$name]: ", message)
+      log(Level.TRACE, message)
     }
   }
 
   override fun debug(message: Any?) {
     if (isDebug) {
-      console.log("$level [$name]: ", message)
+      log(Level.DEBUG, message)
     }
   }
 
   override fun info(message: Any?) {
     if (isInfo) {
-      console.info("$level [$name]: ", message)
+      log(Level.INFO, message)
     }
   }
 
   override fun warn(message: Any?) {
     if (isWarn) {
-      console.warn("$level [$name]: ", message)
+      log(Level.WARN, message)
     }
   }
 
   override fun error(message: Any?) {
     if (isError) {
-      console.error("$level [$name]: ", message)
+      log(Level.ERROR, message)
     }
   }
 
   override fun trace(t: Throwable, message: Any?) {
     if (isTrace) {
-      console.log("$level [$name]: ", message, t)
+      log(Level.TRACE, message, t)
     }
   }
 
   override fun debug(t: Throwable, message: Any?) {
     if (isDebug) {
-      console.log("$level [$name]: ", message, t)
+      log(Level.DEBUG, message, t)
     }
   }
 
   override fun info(t: Throwable, message: Any?) {
     if (isInfo) {
-      console.info("$level [$name]: ", message, t)
+      log(Level.INFO, message, t)
     }
   }
 
   override fun warn(t: Throwable, message: Any?) {
     if (isWarn) {
-      console.warn("$level [$name]: ", message, t)
+      log(Level.WARN, message, t)
     }
   }
 
   override fun error(t: Throwable, message: Any?) {
     if (isError) {
-      console.error("$level [$name]: ", message, t)
+      log(Level.ERROR, message, t)
     }
   }
 
diff --git a/src/main/kotlin/ch/grisu118/js/logger/LoggerConfig.kt b/src/main/kotlin/ch/grisu118/js/logger/LoggerConfig.kt
new file mode 100644
index 0000000..6ed7034
--- /dev/null
+++ b/src/main/kotlin/ch/grisu118/js/logger/LoggerConfig.kt
@@ -0,0 +1,29 @@
+package ch.grisu118.js.logger
+
+import ch.grisu118.js.api.Date
+
+object LoggerConfig {
+
+  /**
+   * The template for the log messages.
+   * The following Placeholders exists:
+   * + **%l** - Will be replaced with the level of this message
+   * + **%n** - Will be replaced with the name of the logger
+   * + **%m** - Will be replaced with the message
+   * + **%t** - Will be replaced with the current time
+   * + **%dt** - Will be replaced with the iso datetime string
+   * + **%%** - Will be replaced with with a single `%`
+   */
+  var messageTemplate = "%l [%n]: %m"
+
+  internal fun replace(level: Level, name: String, message: Any?): String {
+    val date = Date()
+    var msg = messageTemplate.replace("%l", level.toString())
+    msg = msg.replace("%n", name)
+    msg = msg.replace("%m", message.toString())
+    msg = msg.replace("%dt", date.toISOString())
+    msg = msg.replace("%t", date.toTimeString())
+    msg = msg.replace("%%", "%")
+    return msg
+  }
+}
\ No newline at end of file