diff --git a/README.md b/README.md
index b096f15..7f68f66 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-![MAVEN](https://img.shields.io/badge/Maven-v2.1.2-blue) ![Platform](https://img.shields.io/badge/platform-android-green?color=lightgray) ![API](https://img.shields.io/badge/API-21-brightgreen?color=brightgreen) ![Platform](https://img.shields.io/badge/platform-desktop-green?color=lightgray)
+![MAVEN](https://img.shields.io/badge/Maven-v2.2.0-blue) ![Platform](https://img.shields.io/badge/platform-android-green?color=lightgray) ![API](https://img.shields.io/badge/API-21-brightgreen?color=brightgreen) ![Platform](https://img.shields.io/badge/platform-desktop-green?color=lightgray)
 <h1 align="center">
     <img height="300" src="https://raw.githubusercontent.com/alphicc/Brick/main/media/logo.png"/>
     <br>
diff --git a/brick/src/commonMain/kotlin/com/alphicc/brick/RouterConfig.kt b/brick/src/commonMain/kotlin/com/alphicc/brick/RouterConfig.kt
new file mode 100644
index 0000000..acee094
--- /dev/null
+++ b/brick/src/commonMain/kotlin/com/alphicc/brick/RouterConfig.kt
@@ -0,0 +1,10 @@
+package com.alphicc.brick
+
+data class RouterConfig(
+    val broadcastFlowReplay: Int,
+    val broadcastFlowExtraBufferCapacity: Int
+) {
+    companion object {
+        fun default(): RouterConfig = RouterConfig(broadcastFlowReplay = 1, broadcastFlowExtraBufferCapacity = 10)
+    }
+}
\ No newline at end of file
diff --git a/brick/src/commonMain/kotlin/com/alphicc/brick/TreeRouter.kt b/brick/src/commonMain/kotlin/com/alphicc/brick/TreeRouter.kt
index 989ea2e..8b7efb5 100644
--- a/brick/src/commonMain/kotlin/com/alphicc/brick/TreeRouter.kt
+++ b/brick/src/commonMain/kotlin/com/alphicc/brick/TreeRouter.kt
@@ -15,6 +15,8 @@ interface TreeRouter : ContainerConnector, CompositeComponentRouter, ComponentRo
 
     fun branch(containerComponentKey: String): TreeRouter
 
+    fun branch(containerComponentKey: String, config: RouterConfig): TreeRouter
+
     fun setOverlay(component: Component<*>)
 
     fun <A> setOverlay(component: Component<*>, argument: A)
@@ -26,6 +28,7 @@ interface TreeRouter : ContainerConnector, CompositeComponentRouter, ComponentRo
     suspend fun <A> passBroadcastArgument(argument: A)
 
     companion object {
-        fun new(): TreeRouter = TreeRouterImpl()
+        fun new(): TreeRouter = TreeRouterImpl(config = RouterConfig.default())
+        fun new(config: RouterConfig): TreeRouter = TreeRouterImpl(config = config)
     }
 }
\ No newline at end of file
diff --git a/brick/src/commonMain/kotlin/com/alphicc/brick/TreeRouterImpl.kt b/brick/src/commonMain/kotlin/com/alphicc/brick/TreeRouterImpl.kt
index c21ffa5..7985e4a 100644
--- a/brick/src/commonMain/kotlin/com/alphicc/brick/TreeRouterImpl.kt
+++ b/brick/src/commonMain/kotlin/com/alphicc/brick/TreeRouterImpl.kt
@@ -8,7 +8,8 @@ import kotlinx.coroutines.flow.StateFlow
 
 internal class TreeRouterImpl(
     override val initialComponent: Component<*>? = null,
-    override val parentRouter: TreeRouter? = null
+    override val parentRouter: TreeRouter? = null,
+    config: RouterConfig
 ) : TreeRouter {
 
     private val keyManager = KeyManager()
@@ -17,7 +18,10 @@ internal class TreeRouterImpl(
     private val _currentComponentFlow: MutableStateFlow<Component<*>?> = MutableStateFlow(null)
     private val _currentChildFlow: MutableStateFlow<List<Component<*>>> = MutableStateFlow(emptyList())
     private val _isRouterEmpty: MutableStateFlow<Boolean> = MutableStateFlow(true)
-    private val _broadcastFlow: MutableSharedFlow<Any> = MutableSharedFlow(replay = 1, extraBufferCapacity = 10)
+    private val _broadcastFlow: MutableSharedFlow<Any> = MutableSharedFlow(
+        replay = config.broadcastFlowReplay,
+        extraBufferCapacity = config.broadcastFlowExtraBufferCapacity
+    )
 
     private val childRouters: AtomicRef<List<Pair<String, TreeRouter>>> = atomic(emptyList())
     private val tree: AtomicRef<List<Node>> = atomic(emptyList())
@@ -102,8 +106,11 @@ internal class TreeRouterImpl(
         fetchNode()
     }
 
-    override fun branch(containerComponentKey: String): TreeRouter {
-        val newRouter = TreeRouterImpl(initialComponent, this)
+    override fun branch(containerComponentKey: String): TreeRouter =
+        branch(containerComponentKey, RouterConfig.default())
+
+    override fun branch(containerComponentKey: String, config: RouterConfig): TreeRouter {
+        val newRouter = TreeRouterImpl(initialComponent, this, config)
         val childRouters = childRouters.value.toMutableList()
         childRouters.add(containerComponentKey to newRouter)
         this.childRouters.value = childRouters
diff --git a/desktop/build.gradle.kts b/desktop/build.gradle.kts
index f327e50..d745458 100644
--- a/desktop/build.gradle.kts
+++ b/desktop/build.gradle.kts
@@ -6,7 +6,7 @@ plugins {
 }
 
 group = "io.github.alphicc"
-version = "2.1.2"
+version = "2.2.0"
 
 kotlin {
     jvm {
diff --git a/gradle.properties b/gradle.properties
index 624675a..e97cf78 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -13,7 +13,7 @@ gradle_tools_version=7.0.4
 publish_plugin_version=0.18.0
 
 GROUP=io.github.alphicc
-VERSION_NAME=2.1.2
+VERSION_NAME=2.2.0
 
 POM_NAME=Brick
 POM_DESCRIPTION=Brick - Navigation library for Jetpack Compose.