diff --git a/krossbow-websocket-spring/api/krossbow-websocket-spring.api b/krossbow-websocket-spring/api/krossbow-websocket-spring.api
index 0f01030d8..6114b2f99 100644
--- a/krossbow-websocket-spring/api/krossbow-websocket-spring.api
+++ b/krossbow-websocket-spring/api/krossbow-websocket-spring.api
@@ -1,21 +1,3 @@
-public final class org/hildan/krossbow/websocket/spring/SpringDefaultWebSocketClient : org/hildan/krossbow/websocket/spring/SpringWebSocketClientAdapter {
-	public static final field INSTANCE Lorg/hildan/krossbow/websocket/spring/SpringDefaultWebSocketClient;
-}
-
-public final class org/hildan/krossbow/websocket/spring/SpringJettyWebSocketClient : org/hildan/krossbow/websocket/spring/SpringWebSocketClientAdapter {
-	public static final field INSTANCE Lorg/hildan/krossbow/websocket/spring/SpringJettyWebSocketClient;
-}
-
-public final class org/hildan/krossbow/websocket/spring/SpringSockJSWebSocketClient : org/hildan/krossbow/websocket/spring/SpringWebSocketClientAdapter {
-	public static final field INSTANCE Lorg/hildan/krossbow/websocket/spring/SpringSockJSWebSocketClient;
-}
-
-public class org/hildan/krossbow/websocket/spring/SpringWebSocketClientAdapter : org/hildan/krossbow/websocket/WebSocketClient {
-	public fun <init> (Lorg/springframework/web/socket/client/WebSocketClient;)V
-	public fun connect (Ljava/lang/String;Ljava/util/Map;Lkotlin/coroutines/Continuation;)Ljava/lang/Object;
-	public synthetic fun connect (Ljava/lang/String;Lkotlin/coroutines/Continuation;)Ljava/lang/Object;
-}
-
 public final class org/hildan/krossbow/websocket/spring/SpringWebSocketClientKt {
 	public static final fun asKrossbowWebSocketClient (Lorg/springframework/web/socket/client/WebSocketClient;)Lorg/hildan/krossbow/websocket/WebSocketClient;
 }
diff --git a/krossbow-websocket-spring/src/main/kotlin/org/hildan/krossbow/websocket/spring/SpringWebSocketClient.kt b/krossbow-websocket-spring/src/main/kotlin/org/hildan/krossbow/websocket/spring/SpringWebSocketClient.kt
index 224608611..cd3f86649 100644
--- a/krossbow-websocket-spring/src/main/kotlin/org/hildan/krossbow/websocket/spring/SpringWebSocketClient.kt
+++ b/krossbow-websocket-spring/src/main/kotlin/org/hildan/krossbow/websocket/spring/SpringWebSocketClient.kt
@@ -20,14 +20,9 @@ import org.springframework.web.socket.client.WebSocketClient as SpringWebSocketC
  * Adapts this Spring [WebSocketClient][SpringWebSocketClient] to the Krossbow
  * [WebSocketClient][KrossbowWebSocketClient] interface.
  */
-@Suppress("DEPRECATION")
 fun SpringWebSocketClient.asKrossbowWebSocketClient(): KrossbowWebSocketClient = SpringWebSocketClientAdapter(this)
 
-@Deprecated(
-    message = "This class is internal and will become invisible in future versions, " +
-            "prefer the adapter extension asKrossbowWebSocketClient().",
-)
-open class SpringWebSocketClientAdapter(private val client: SpringWebSocketClient) : KrossbowWebSocketClient {
+private class SpringWebSocketClientAdapter(private val client: SpringWebSocketClient) : KrossbowWebSocketClient {
 
     override suspend fun connect(url: String, headers: Map<String, String>): WebSocketConnectionWithPingPong {
         try {