diff --git a/src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum/WsConnection.kt b/src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum/WsConnection.kt
index 44eec5d0..975813b0 100644
--- a/src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum/WsConnection.kt
+++ b/src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum/WsConnection.kt
@@ -240,7 +240,7 @@ open class WsConnection(
             .aggregateFrames(msgSizeLimit)
             .receiveFrames()
             .map { ByteBufInputStream(it.content()).readAllBytes() }
-            .filter{ it.isNotEmpty() }
+            .filter { it.isNotEmpty() }
             .flatMap {
                 try {
                     val msg = parser.parse(it)