diff --git a/kyo-chatgpt/jvm/src/main/scala/kyo/chatgpt/UI.scala b/kyo-chatgpt/jvm/src/main/scala/kyo/chatgpt/UI.scala
index 7e07f0b9b..83a117759 100644
--- a/kyo-chatgpt/jvm/src/main/scala/kyo/chatgpt/UI.scala
+++ b/kyo-chatgpt/jvm/src/main/scala/kyo/chatgpt/UI.scala
@@ -187,7 +187,7 @@ object UI extends App {
           _ <- chan.put((message, enabledModes.toList, p))
           r <- p.get
         } yield r
-      }.block
+      }.map(_.block)
     }
 }
 
diff --git a/kyo-core/shared/src/main/scala/kyo/KyoApp.scala b/kyo-core/shared/src/main/scala/kyo/KyoApp.scala
index ee12c4fea..89823c951 100644
--- a/kyo-core/shared/src/main/scala/kyo/KyoApp.scala
+++ b/kyo-core/shared/src/main/scala/kyo/KyoApp.scala
@@ -11,22 +11,25 @@ import randoms._
 import concurrent.fibers._
 import concurrent.timers._
 import scala.concurrent.duration.Duration
+import kyo.KyoApp.Effects
 
 abstract class KyoApp {
 
   final def main(args: Array[String]): Unit =
-    IOs.run(KyoApp.runFiber(Duration.Inf)(run(args.toList)).block)
+    IOs.run(KyoApp.runFiber(Duration.Inf)(run(args.toList)).map(_.block))
 
   def run(
       args: List[String]
-  ): Unit > (IOs with Fibers with Resources with Clocks with Consoles with Randoms with Timers with Aspects)
+  ): Unit > Effects
 
 }
 
 object KyoApp {
-  def runFiber[T](timeout: Duration)(
-      v: T > (IOs with Fibers with Resources with Clocks with Consoles with Randoms with Timers with Aspects)
-  ): Fiber[T] = {
+
+  type Effects =
+    IOs with Fibers with Resources with Clocks with Consoles with Randoms with Timers with Aspects
+
+  def runFiber[T](timeout: Duration)(v: T > Effects): Fiber[T] > IOs = {
     val v1
         : T > (IOs with Fibers with Resources with Clocks with Consoles with Timers with Aspects) =
       Randoms.run(v)
@@ -38,7 +41,6 @@ object KyoApp {
     val v6: T > (IOs with Fibers)                                         = Timers.run(v5)
     val v7: T > (IOs with Fibers with Timers) = Fibers.timeout(timeout)(v6)
     val v8: T > (IOs with Fibers)             = Timers.run(v6)
-    val v9: Fiber[T] > IOs                    = Fibers.run(IOs.runLazy(v8))
-    IOs.run(v9)
+    IOs(Fibers.run(IOs.runLazy(v8)))
   }
 }
diff --git a/kyo-core/shared/src/test/scala/kyoTest/KyoTest.scala b/kyo-core/shared/src/test/scala/kyoTest/KyoTest.scala
index a7eafad9d..b397fddeb 100644
--- a/kyo-core/shared/src/test/scala/kyoTest/KyoTest.scala
+++ b/kyo-core/shared/src/test/scala/kyoTest/KyoTest.scala
@@ -72,7 +72,7 @@ class KyoTest extends AsyncFreeSpec with Assertions {
   def run(
       v: => Assertion > (IOs with Fibers with Resources with Clocks with Consoles with Randoms with Timers)
   ): Future[Assertion] = {
-    IOs.run(KyoApp.runFiber(timeout)(v).toFuture)
+    IOs.run(KyoApp.runFiber(timeout)(v).map(_.toFuture))
   }
 
   class Check[T, S](equals: Boolean) {