diff --git a/src/main/java/com/github/rutledgepaulv/monads/Lazy.java b/src/main/java/com/github/rutledgepaulv/monads/Lazy.java
index 3c68f0c..82862df 100644
--- a/src/main/java/com/github/rutledgepaulv/monads/Lazy.java
+++ b/src/main/java/com/github/rutledgepaulv/monads/Lazy.java
@@ -216,7 +216,7 @@ public final T get() {
      */
     @Override
     public final Stream<T> stream() {
-        return Stream.of(this).map(Lazy::optional)
+        return Stream.of(this).parallel().map(Lazy::optional)
                 .filter(Optional::isPresent)
                 .map(Optional::get);
     }