diff --git a/idealingua-v1/idealingua-v1-runtime-rpc-http4s/src/main/scala/izumi/idealingua/runtime/rpc/http4s/clients/WsRpcDispatcherFactory.scala b/idealingua-v1/idealingua-v1-runtime-rpc-http4s/src/main/scala/izumi/idealingua/runtime/rpc/http4s/clients/WsRpcDispatcherFactory.scala
index b047ed20..44d56205 100644
--- a/idealingua-v1/idealingua-v1-runtime-rpc-http4s/src/main/scala/izumi/idealingua/runtime/rpc/http4s/clients/WsRpcDispatcherFactory.scala
+++ b/idealingua-v1/idealingua-v1-runtime-rpc-http4s/src/main/scala/izumi/idealingua/runtime/rpc/http4s/clients/WsRpcDispatcherFactory.scala
@@ -88,6 +88,7 @@ class WsRpcDispatcherFactory[F[+_, +_]: Async2: Temporal2: Primitives2: UnsafeRu
     override def onClose(websocket: WebSocket, code: Int, reason: String): Unit = {
       socketRef.set(None)
       websocket.sendCloseFrame()
+      ()
     }
 
     override def onError(t: Throwable): Unit = {
diff --git a/idealingua-v1/idealingua-v1-runtime-rpc-http4s/src/main/scala/izumi/idealingua/runtime/rpc/http4s/ws/WsRequestState.scala b/idealingua-v1/idealingua-v1-runtime-rpc-http4s/src/main/scala/izumi/idealingua/runtime/rpc/http4s/ws/WsRequestState.scala
index e7e3b4f0..42d26f79 100644
--- a/idealingua-v1/idealingua-v1-runtime-rpc-http4s/src/main/scala/izumi/idealingua/runtime/rpc/http4s/ws/WsRequestState.scala
+++ b/idealingua-v1/idealingua-v1-runtime-rpc-http4s/src/main/scala/izumi/idealingua/runtime/rpc/http4s/ws/WsRequestState.scala
@@ -81,7 +81,7 @@ class WsRequestState[F[+_, +_]: IO2: Temporal2: Primitives2] extends WsClientRes
         responses.values().removeIf {
           handler =>
             val isExpired = handler.expired(now)
-            if (isExpired) removed.addOne(handler)
+            if (isExpired) removed.append(handler)
             isExpired
         }
         removed.toList