diff --git a/cffu-core/src/main/java/io/foldright/cffu/Cffu.java b/cffu-core/src/main/java/io/foldright/cffu/Cffu.java
index fd9d3387..7ca3345c 100644
--- a/cffu-core/src/main/java/io/foldright/cffu/Cffu.java
+++ b/cffu-core/src/main/java/io/foldright/cffu/Cffu.java
@@ -228,7 +228,6 @@ public Cffu<Void> thenRunAsync(Runnable action, Executor executor) {
      *
      * @return the new Cffu
      */
-    @Contract(pure = true)
     public <U1, U2> Cffu<Tuple2<U1, U2>> thenTupleMApplyFastFailAsync(
             Function<? super T, ? extends U1> fn1, Function<? super T, ? extends U2> fn2) {
         return reset0(CompletableFutureUtils.thenTupleMApplyFastFailAsync(cf, fn1, fn2));
@@ -246,7 +245,6 @@ public <U1, U2> Cffu<Tuple2<U1, U2>> thenTupleMApplyFastFailAsync(
      *
      * @return the new Cffu
      */
-    @Contract(pure = true)
     public <U1, U2, U3> Cffu<Tuple3<U1, U2, U3>> thenTupleMApplyFastFailAsync(
             Function<? super T, ? extends U1> fn1, Function<? super T, ? extends U2> fn2,
             Function<? super T, ? extends U3> fn3) {
@@ -265,7 +263,6 @@ public <U1, U2, U3> Cffu<Tuple3<U1, U2, U3>> thenTupleMApplyFastFailAsync(
      *
      * @return the new Cffu
      */
-    @Contract(pure = true)
     public <U1, U2, U3, U4> Cffu<Tuple4<U1, U2, U3, U4>> thenTupleMApplyFastFailAsync(
             Function<? super T, ? extends U1> fn1, Function<? super T, ? extends U2> fn2,
             Function<? super T, ? extends U3> fn3, Function<? super T, ? extends U4> fn4) {
@@ -284,7 +281,6 @@ public <U1, U2, U3, U4> Cffu<Tuple4<U1, U2, U3, U4>> thenTupleMApplyFastFailAsyn
      *
      * @return the new Cffu
      */
-    @Contract(pure = true)
     public <U1, U2, U3, U4, U5> Cffu<Tuple5<U1, U2, U3, U4, U5>> thenTupleMApplyFastFailAsync(
             Function<? super T, ? extends U1> fn1, Function<? super T, ? extends U2> fn2,
             Function<? super T, ? extends U3> fn3, Function<? super T, ? extends U4> fn4,
@@ -301,7 +297,6 @@ public <U1, U2, U3, U4, U5> Cffu<Tuple5<U1, U2, U3, U4, U5>> thenTupleMApplyFast
      *
      * @return the new Cffu
      */
-    @Contract(pure = true)
     public <U1, U2> Cffu<Tuple2<U1, U2>> thenTupleMApplyAsync(
             Function<? super T, ? extends U1> fn1, Function<? super T, ? extends U2> fn2) {
         return reset0(CompletableFutureUtils.thenTupleMApplyAsync(cf, fn1, fn2));
@@ -316,7 +311,6 @@ public <U1, U2> Cffu<Tuple2<U1, U2>> thenTupleMApplyAsync(
      *
      * @return the new Cffu
      */
-    @Contract(pure = true)
     public <U1, U2, U3> Cffu<Tuple3<U1, U2, U3>> thenTupleMApplyAsync(
             Function<? super T, ? extends U1> fn1, Function<? super T, ? extends U2> fn2,
             Function<? super T, ? extends U3> fn3) {
@@ -332,7 +326,6 @@ public <U1, U2, U3> Cffu<Tuple3<U1, U2, U3>> thenTupleMApplyAsync(
      *
      * @return the new Cffu
      */
-    @Contract(pure = true)
     public <U1, U2, U3, U4> Cffu<Tuple4<U1, U2, U3, U4>> thenTupleMApplyAsync(
             Function<? super T, ? extends U1> fn1, Function<? super T, ? extends U2> fn2,
             Function<? super T, ? extends U3> fn3, Function<? super T, ? extends U4> fn4) {
@@ -348,7 +341,6 @@ public <U1, U2, U3, U4> Cffu<Tuple4<U1, U2, U3, U4>> thenTupleMApplyAsync(
      *
      * @return the new Cffu
      */
-    @Contract(pure = true)
     public <U1, U2, U3, U4, U5> Cffu<Tuple5<U1, U2, U3, U4, U5>> thenTupleMApplyAsync(
             Function<? super T, ? extends U1> fn1, Function<? super T, ? extends U2> fn2,
             Function<? super T, ? extends U3> fn3, Function<? super T, ? extends U4> fn4,
diff --git a/cffu-core/src/main/java/io/foldright/cffu/CffuFactory.java b/cffu-core/src/main/java/io/foldright/cffu/CffuFactory.java
index 67c4b806..dec5edf8 100644
--- a/cffu-core/src/main/java/io/foldright/cffu/CffuFactory.java
+++ b/cffu-core/src/main/java/io/foldright/cffu/CffuFactory.java
@@ -163,7 +163,6 @@ public Cffu<Void> runAsync(Runnable action, Executor executor) {
      * @return the new Cffu
      * @see #allResultsOfFastFail(CompletionStage[])
      */
-    @Contract(pure = true)
     public <T1, T2> Cffu<Tuple2<T1, T2>> tupleMSupplyFastFailAsync(
             Supplier<? extends T1> supplier1, Supplier<? extends T2> supplier2) {
         return create(CompletableFutureUtils.tupleMSupplyFastFailAsync(supplier1, supplier2));
@@ -179,7 +178,6 @@ public <T1, T2> Cffu<Tuple2<T1, T2>> tupleMSupplyFastFailAsync(
      * @return the new Cffu
      * @see #allResultsOfFastFail(CompletionStage[])
      */
-    @Contract(pure = true)
     public <T1, T2, T3> Cffu<Tuple3<T1, T2, T3>> tupleMSupplyFastFailAsync(
             Supplier<? extends T1> supplier1, Supplier<? extends T2> supplier2, Supplier<? extends T3> supplier3) {
         return create(CompletableFutureUtils.tupleMSupplyFastFailAsync(supplier1, supplier2, supplier3));
@@ -195,7 +193,6 @@ public <T1, T2, T3> Cffu<Tuple3<T1, T2, T3>> tupleMSupplyFastFailAsync(
      * @return the new Cffu
      * @see #allResultsOfFastFail(CompletionStage[])
      */
-    @Contract(pure = true)
     public <T1, T2, T3, T4> Cffu<Tuple4<T1, T2, T3, T4>> tupleMSupplyFastFailAsync(
             Supplier<? extends T1> supplier1, Supplier<? extends T2> supplier2,
             Supplier<? extends T3> supplier3, Supplier<? extends T4> supplier4) {
@@ -212,7 +209,6 @@ public <T1, T2, T3, T4> Cffu<Tuple4<T1, T2, T3, T4>> tupleMSupplyFastFailAsync(
      * @return the new Cffu
      * @see #allResultsOfFastFail(CompletionStage[])
      */
-    @Contract(pure = true)
     public <T1, T2, T3, T4, T5> Cffu<Tuple5<T1, T2, T3, T4, T5>> tupleMSupplyFastFailAsync(
             Supplier<? extends T1> supplier1, Supplier<? extends T2> supplier2, Supplier<? extends T3> supplier3,
             Supplier<? extends T4> supplier4, Supplier<? extends T5> supplier5) {
@@ -287,7 +283,6 @@ public <T1,T2,T3,T4,T5> Cffu<Tuple5<T1,T2,T3,T4,T5>> tupleMSupplyMostSuccessAsyn
      * @return the new Cffu
      * @see #allResultsOf(CompletionStage[])
      */
-    @Contract(pure = true)
     public <T1, T2> Cffu<Tuple2<T1, T2>> tupleMSupplyAsync(
             Supplier<? extends T1> supplier1, Supplier<? extends T2> supplier2) {
         return create(CompletableFutureUtils.tupleMSupplyAsync(supplier1, supplier2));
@@ -301,7 +296,6 @@ public <T1, T2> Cffu<Tuple2<T1, T2>> tupleMSupplyAsync(
      * @return the new Cffu
      * @see #allResultsOf(CompletionStage[])
      */
-    @Contract(pure = true)
     public <T1, T2, T3> Cffu<Tuple3<T1, T2, T3>> tupleMSupplyAsync(
             Supplier<? extends T1> supplier1, Supplier<? extends T2> supplier2, Supplier<? extends T3> supplier3) {
         return create(CompletableFutureUtils.tupleMSupplyAsync(supplier1, supplier2, supplier3));
@@ -315,7 +309,6 @@ public <T1, T2, T3> Cffu<Tuple3<T1, T2, T3>> tupleMSupplyAsync(
      * @return the new Cffu
      * @see #allResultsOf(CompletionStage[])
      */
-    @Contract(pure = true)
     public <T1, T2, T3, T4> Cffu<Tuple4<T1, T2, T3, T4>> tupleMSupplyAsync(
             Supplier<? extends T1> supplier1, Supplier<? extends T2> supplier2,
             Supplier<? extends T3> supplier3, Supplier<? extends T4> supplier4) {
@@ -330,7 +323,6 @@ public <T1, T2, T3, T4> Cffu<Tuple4<T1, T2, T3, T4>> tupleMSupplyAsync(
      * @return the new Cffu
      * @see #allResultsOf(CompletionStage[])
      */
-    @Contract(pure = true)
     public <T1, T2, T3, T4, T5> Cffu<Tuple5<T1, T2, T3, T4, T5>> tupleMSupplyAsync(
             Supplier<? extends T1> supplier1, Supplier<? extends T2> supplier2, Supplier<? extends T3> supplier3,
             Supplier<? extends T4> supplier4, Supplier<? extends T5> supplier5) {