diff --git a/cffu-kotlin/src/main/java/io/foldright/cffu/kotlin/CompletableFutureExtensions.kt b/cffu-kotlin/src/main/java/io/foldright/cffu/kotlin/CompletableFutureExtensions.kt
index bdd565ad..263a904d 100644
--- a/cffu-kotlin/src/main/java/io/foldright/cffu/kotlin/CompletableFutureExtensions.kt
+++ b/cffu-kotlin/src/main/java/io/foldright/cffu/kotlin/CompletableFutureExtensions.kt
@@ -40,7 +40,7 @@ import java.util.concurrent.TimeUnit
  * @see allOfCffu
  * @see allOfCompletableFutureVoid
  */
-fun <T> Collection<CompletableFuture<T>>.allOfCompletableFuture(): CompletableFuture<List<T>> =
+fun <T> Collection<CompletableFuture<out T>>.allOfCompletableFuture(): CompletableFuture<List<T>> =
     CompletableFutureUtils.allResultsOf(*this.toTypedArray())
 
 /**
@@ -57,7 +57,7 @@ fun <T> Collection<CompletableFuture<T>>.allOfCompletableFuture(): CompletableFu
  * @see allOfCffu
  * @see allOfCompletableFutureVoid
  */
-fun <T> Array<out CompletableFuture<T>>.allOfCompletableFuture(): CompletableFuture<List<T>> =
+fun <T> Array<out CompletableFuture<out T>>.allOfCompletableFuture(): CompletableFuture<List<T>> =
     CompletableFutureUtils.allResultsOf(*this)
 
 /**
@@ -119,7 +119,7 @@ fun Array<out CompletableFuture<*>>.allOfCompletableFutureVoid(): CompletableFut
  * @see allOfFastFailCffu
  * @see allOfFastFailCompletableFutureVoid
  */
-fun <T> Collection<CompletableFuture<T>>.allOfFastFailCompletableFuture(): CompletableFuture<List<T>> =
+fun <T> Collection<CompletableFuture<out T>>.allOfFastFailCompletableFuture(): CompletableFuture<List<T>> =
     CompletableFutureUtils.allResultsOfFastFail(*this.toTypedArray())
 
 /**
@@ -137,7 +137,7 @@ fun <T> Collection<CompletableFuture<T>>.allOfFastFailCompletableFuture(): Compl
  * @see allOfFastFailCffu
  * @see allOfFastFailCompletableFutureVoid
  */
-fun <T> Array<out CompletableFuture<T>>.allOfFastFailCompletableFuture(): CompletableFuture<List<T>> =
+fun <T> Array<out CompletableFuture<out T>>.allOfFastFailCompletableFuture(): CompletableFuture<List<T>> =
     CompletableFutureUtils.allResultsOfFastFail(*this)
 
 /**
@@ -185,7 +185,6 @@ fun Array<out CompletableFuture<*>>.allOfFastFailCompletableFutureVoid(): Comple
 //    - anyOfCompletableFuture
 //    - anyOfCompletableFutureAny
 //    - anyOfSuccessCompletableFuture
-//    - anyOfSuccessCompletableFutureAny
 ////////////////////////////////////////
 
 /**
@@ -195,13 +194,11 @@ fun Array<out CompletableFuture<*>>.allOfFastFailCompletableFutureVoid(): Comple
  * with a CompletionException holding this exception as its cause.
  * If no CompletableFutures are provided, returns an incomplete CompletableFuture.
  *
- * Same as [anyOfCompletableFutureAny], but return result type is specified type instead of type `Any`.
  * Same as [CompletableFutureUtils.anyOf], providing this method is convenient for method chaining.
  *
  * @see anyOfCffu
- * @see anyOfCompletableFutureAny
  */
-fun <T> Collection<CompletableFuture<T>>.anyOfCompletableFuture(): CompletableFuture<T> =
+fun <T> Collection<CompletableFuture<out T>>.anyOfCompletableFuture(): CompletableFuture<T> =
     CompletableFutureUtils.anyOf(*this.toTypedArray())
 
 /**
@@ -211,49 +208,13 @@ fun <T> Collection<CompletableFuture<T>>.anyOfCompletableFuture(): CompletableFu
  * with a CompletionException holding this exception as its cause.
  * If no CompletableFutures are provided, returns an incomplete CompletableFuture.
  *
- * Same as [anyOfCompletableFutureAny], but return result type is specified type instead of type `Any`.
  * Same as [CompletableFutureUtils.anyOf], providing this method is convenient for method chaining.
  *
  * @see anyOfCffu
- * @see anyOfCompletableFutureAny
  */
-fun <T> Array<out CompletableFuture<T>>.anyOfCompletableFuture(): CompletableFuture<T> =
+fun <T> Array<out CompletableFuture<out T>>.anyOfCompletableFuture(): CompletableFuture<T> =
     CompletableFutureUtils.anyOf(*this)
 
-/**
- * Returns a new CompletableFuture that is completed
- * when any of the given CompletableFutures complete, with the same result.
- * Otherwise, if it completed exceptionally, the returned CompletableFuture also does so,
- * with a CompletionException holding this exception as its cause.
- * If no CompletableFutures are provided, returns an incomplete CompletableFuture.
- *
- * Same as [CompletableFuture.anyOf], providing this method is convenient for method chaining.
- *
- * @see anyOfCffu
- * @see anyOfCffuAny
- * @see anyOfCompletableFuture
- * @see CompletableFuture.anyOf
- */
-fun Collection<CompletableFuture<*>>.anyOfCompletableFutureAny(): CompletableFuture<Any> =
-    CompletableFuture.anyOf(*this.toTypedArray())
-
-/**
- * Returns a new CompletableFuture that is completed
- * when any of the given CompletableFutures complete, with the same result.
- * Otherwise, if it completed exceptionally, the returned CompletableFuture also does so,
- * with a CompletionException holding this exception as its cause.
- * If no CompletableFutures are provided, returns an incomplete CompletableFuture.
- *
- * Same as [CompletableFuture.anyOf], providing this method is convenient for method chaining.
- *
- * @see anyOfCffu
- * @see anyOfCffuAny
- * @see anyOfCompletableFuture
- * @see CompletableFuture.anyOf
- */
-fun Array<out CompletableFuture<*>>.anyOfCompletableFutureAny(): CompletableFuture<Any> =
-    CompletableFuture.anyOf(*this)
-
 /**
  * Returns a new CompletableFuture that is successful when any of the given CompletableFutures success,
  * with the same result. Otherwise, all the given CompletableFutures complete exceptionally,
@@ -262,13 +223,12 @@ fun Array<out CompletableFuture<*>>.anyOfCompletableFutureAny(): CompletableFutu
  * returns a new CompletableFuture that is already completed exceptionally with a CompletionException
  * holding a [NoCfsProvidedException][io.foldright.cffu.NoCfsProvidedException] as its cause.
  *
- * Same as [anyOfSuccessCompletableFutureAny], but return result type is specified type instead of type `Any`.
  * Same as [CompletableFutureUtils.anyOfSuccess], providing this method is convenient for method chaining.
  *
  * @see anyOfCompletableFuture
  * @see CompletableFutureUtils.anyOfSuccess
  */
-fun <T> Collection<CompletableFuture<T>>.anyOfSuccessCompletableFuture(): CompletableFuture<T> =
+fun <T> Collection<CompletableFuture<out T>>.anyOfSuccessCompletableFuture(): CompletableFuture<T> =
     CompletableFutureUtils.anyOfSuccess(*this.toTypedArray())
 
 /**
@@ -279,47 +239,12 @@ fun <T> Collection<CompletableFuture<T>>.anyOfSuccessCompletableFuture(): Comple
  * returns a new CompletableFuture that is already completed exceptionally with a CompletionException
  * holding a [NoCfsProvidedException][io.foldright.cffu.NoCfsProvidedException] as its cause.
  *
- * Same as [anyOfSuccessCompletableFutureAny], but return result type is specified type instead of type `Any`.
- * Same as [CompletableFutureUtils.anyOfSuccess], providing this method is convenient for method chaining.
- *
- * @see anyOfCompletableFuture
- * @see CompletableFutureUtils.anyOfSuccess
- */
-fun <T> Array<out CompletableFuture<T>>.anyOfSuccessCompletableFuture(): CompletableFuture<T> =
-    CompletableFutureUtils.anyOfSuccess(*this)
-
-/**
- * Returns a new CompletableFuture that is successful when any of the given CompletableFutures success,
- * with the same result. Otherwise, all the given CompletableFutures complete exceptionally,
- * the returned CompletableFuture also does so, with a CompletionException holding
- * an exception from any of the given CompletableFutures as its cause. If no CompletableFutures are provided,
- * returns a new CompletableFuture that is already completed exceptionally with a CompletionException
- * holding a [NoCfsProvidedException][io.foldright.cffu.NoCfsProvidedException] as its cause.
- *
- * Same as [CompletableFutureUtils.anyOfSuccess], providing this method is convenient for method chaining.
- *
- * @see anyOfSuccessCffu
- * @see anyOfCompletableFuture
- * @see CompletableFutureUtils.anyOfSuccess
- */
-fun Collection<CompletableFuture<*>>.anyOfSuccessCompletableFutureAny(): CompletableFuture<Any> =
-    CompletableFutureUtils.anyOfSuccess(*this.toTypedArray())
-
-/**
- * Returns a new CompletableFuture that is successful when any of the given CompletableFutures success,
- * with the same result. Otherwise, all the given CompletableFutures complete exceptionally,
- * the returned CompletableFuture also does so, with a CompletionException holding
- * an exception CompletableFuture any of the given CompletableFutures as its cause. If no CompletableFutures are provided,
- * returns a new Cffu that is already completed exceptionally with a CompletionException
- * holding a [NoCfsProvidedException][io.foldright.cffu.NoCfsProvidedException] as its cause.
- *
  * Same as [CompletableFutureUtils.anyOfSuccess], providing this method is convenient for method chaining.
  *
- * @see anyOfSuccessCffu
  * @see anyOfCompletableFuture
  * @see CompletableFutureUtils.anyOfSuccess
  */
-fun Array<out CompletableFuture<*>>.anyOfSuccessCompletableFutureAny(): CompletableFuture<Any> =
+fun <T> Array<out CompletableFuture<out T>>.anyOfSuccessCompletableFuture(): CompletableFuture<T> =
     CompletableFutureUtils.anyOfSuccess(*this)
 
 ////////////////////////////////////////
diff --git a/cffu-kotlin/src/test/java/io/foldright/cffu/test/CompletableFutureExtensionsTest.kt b/cffu-kotlin/src/test/java/io/foldright/cffu/test/CompletableFutureExtensionsTest.kt
index 1af93fbf..2eb7aaac 100644
--- a/cffu-kotlin/src/test/java/io/foldright/cffu/test/CompletableFutureExtensionsTest.kt
+++ b/cffu-kotlin/src/test/java/io/foldright/cffu/test/CompletableFutureExtensionsTest.kt
@@ -139,21 +139,21 @@ class CompletableFutureExtensionsTest : FunSpec({
             CompletableFuture<String>(),
             CompletableFuture<Double>(),
             CompletableFuture.completedFuture(42),
-        ).anyOfCompletableFutureAny().await() shouldBe 42
-        listOf<CompletableFuture<*>>().anyOfCompletableFutureAny().isDone.shouldBeFalse()
+        ).anyOfCompletableFuture().await() shouldBe 42
+        listOf<CompletableFuture<*>>().anyOfCompletableFuture().isDone.shouldBeFalse()
 
         setOf(
             CompletableFuture<String>(),
             CompletableFuture<Double>(),
             CompletableFuture.completedFuture(42),
-        ).anyOfCompletableFutureAny().await() shouldBe 42
+        ).anyOfCompletableFuture().await() shouldBe 42
 
         arrayOf(
             CompletableFuture<String>(),
             CompletableFuture<Double>(),
             CompletableFuture.completedFuture(42),
-        ).anyOfCompletableFutureAny().await() shouldBe 42
-        arrayOf<CompletableFuture<*>>().anyOfCompletableFutureAny().isDone.shouldBeFalse()
+        ).anyOfCompletableFuture().await() shouldBe 42
+        arrayOf<CompletableFuture<*>>().anyOfCompletableFuture().isDone.shouldBeFalse()
 
         ////////////////////////////////////////
 
@@ -187,24 +187,24 @@ class CompletableFutureExtensionsTest : FunSpec({
             CompletableFuture<String>(),
             CompletableFuture<Double>(),
             CompletableFuture.completedFuture(42),
-        ).anyOfSuccessCompletableFutureAny().await() shouldBe 42
+        ).anyOfSuccessCompletableFuture().await() shouldBe 42
         shouldThrow<NoCfsProvidedException> {
-            listOf<CompletableFuture<*>>().anyOfSuccessCompletableFutureAny().await()
+            listOf<CompletableFuture<*>>().anyOfSuccessCompletableFuture().await()
         }
 
         setOf(
             CompletableFuture<String>(),
             CompletableFuture<Double>(),
             CompletableFuture.completedFuture(42),
-        ).anyOfSuccessCompletableFutureAny().await() shouldBe 42
+        ).anyOfSuccessCompletableFuture().await() shouldBe 42
 
         arrayOf(
             CompletableFuture<String>(),
             CompletableFuture<Double>(),
             CompletableFuture.completedFuture(42),
-        ).anyOfSuccessCompletableFutureAny().await() shouldBe 42
+        ).anyOfSuccessCompletableFuture().await() shouldBe 42
         shouldThrow<NoCfsProvidedException> {
-            arrayOf<CompletableFuture<*>>().anyOfSuccessCompletableFutureAny().await()
+            arrayOf<CompletableFuture<*>>().anyOfSuccessCompletableFuture().await()
         }
 
     }