diff --git a/libp2p/src/main/kotlin/io/libp2p/core/dsl/Builders.kt b/libp2p/src/main/kotlin/io/libp2p/core/dsl/Builders.kt
index 5482b5e8..67dd02fc 100644
--- a/libp2p/src/main/kotlin/io/libp2p/core/dsl/Builders.kt
+++ b/libp2p/src/main/kotlin/io/libp2p/core/dsl/Builders.kt
@@ -33,6 +33,7 @@ import io.libp2p.transport.tcp.TcpTransport
 import io.netty.channel.ChannelHandler
 import io.netty.handler.logging.LogLevel
 import io.netty.handler.logging.LoggingHandler
+import java.util.concurrent.CopyOnWriteArrayList
 
 typealias TransportCtor = (ConnectionUpgrader) -> Transport
 typealias SecureChannelCtor = (PrivKey, List<StreamMuxer>) -> SecureChannel
@@ -173,7 +174,8 @@ open class Builder {
             }
         }
 
-        val muxers = muxers.map { it.createMuxer(streamMultistreamProtocol, protocols.values) }
+        val updatableProtocols: MutableList<ProtocolBinding<Any>> = CopyOnWriteArrayList(protocols.values)
+        val muxers = muxers.map { it.createMuxer(streamMultistreamProtocol, updatableProtocols) }
 
         val secureChannels = secureChannels.values.map { it(privKey, muxers) }
 
@@ -201,7 +203,7 @@ open class Builder {
             networkImpl,
             addressBook,
             network.listen.map { Multiaddr(it) },
-            protocols.values,
+            updatableProtocols,
             broadcastConnHandler,
             streamVisitors
         )
diff --git a/libp2p/src/main/kotlin/io/libp2p/multistream/MultistreamImpl.kt b/libp2p/src/main/kotlin/io/libp2p/multistream/MultistreamImpl.kt
index 570dd69f..8cf242f6 100644
--- a/libp2p/src/main/kotlin/io/libp2p/multistream/MultistreamImpl.kt
+++ b/libp2p/src/main/kotlin/io/libp2p/multistream/MultistreamImpl.kt
@@ -8,14 +8,12 @@ import java.time.Duration
 import java.util.concurrent.CompletableFuture
 
 class MultistreamImpl<TController>(
-    initList: List<ProtocolBinding<TController>> = listOf(),
+    override val bindings: List<ProtocolBinding<TController>>,
     val preHandler: P2PChannelHandler<*>? = null,
     val postHandler: P2PChannelHandler<*>? = null,
     val negotiationTimeLimit: Duration = DEFAULT_NEGOTIATION_TIME_LIMIT
 ) : Multistream<TController> {
 
-    override val bindings: List<ProtocolBinding<TController>> = initList
-
     override fun initChannel(ch: P2PChannel): CompletableFuture<TController> {
         return with(ch) {
             preHandler?.also {