diff --git a/README.md b/README.md
index cfe8227..e376e74 100644
--- a/README.md
+++ b/README.md
@@ -45,22 +45,22 @@ dependencies {
     <dependency>
         <groupId>dev.tommyjs</groupId>
         <artifactId>futur-api</artifactId>
-        <version>1.0.0</version>
+        <version>2.1.1</version>
     </dependency>
     <dependency>
         <groupId>dev.tommyjs</groupId>
         <artifactId>futur-standalone</artifactId>
-        <version>1.0.0</version>
+        <version>2.1.1</version>
     </dependency>
     <dependency>
         <groupId>dev.tommyjs</groupId>
         <artifactId>futur-reactor</artifactId>
-        <version>1.0.0</version>
+        <version>2.1.1</version>
     </dependency>
     <dependency>
         <groupId>dev.tommyjs</groupId>
         <artifactId>futur-reactive-streams</artifactId>
-        <version>1.0.0</version>
+        <version>2.1.1</version>
     </dependency>
 </dependencies>
 ```
diff --git a/futur-api/build.gradle.kts b/futur-api/build.gradle.kts
index 9495788..9e1f36b 100644
--- a/futur-api/build.gradle.kts
+++ b/futur-api/build.gradle.kts
@@ -6,7 +6,7 @@ plugins {
 }
 
 group = "dev.tommyjs"
-version = "2.1.0"
+version = "2.1.1"
 
 repositories {
     mavenCentral()
diff --git a/futur-api/src/main/java/dev/tommyjs/futur/promise/AbstractPromise.java b/futur-api/src/main/java/dev/tommyjs/futur/promise/AbstractPromise.java
index f38e838..2cd548d 100644
--- a/futur-api/src/main/java/dev/tommyjs/futur/promise/AbstractPromise.java
+++ b/futur-api/src/main/java/dev/tommyjs/futur/promise/AbstractPromise.java
@@ -13,6 +13,7 @@ import java.util.Collection;
 import java.util.concurrent.ConcurrentLinkedQueue;
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.TimeoutException;
+import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.concurrent.atomic.AtomicReference;
 
 public abstract class AbstractPromise<T> implements Promise<T> {
@@ -316,13 +317,14 @@ public abstract class AbstractPromise<T> implements Promise<T> {
     }
 
     protected void handleCompletion(@NotNull PromiseCompletion<T> ctx) {
-        AtomicReference<Boolean> success = new AtomicReference<>();
+        AtomicBoolean success = new AtomicBoolean();
         completion.getAndUpdate(c -> {
             if (c == null) {
-                return null;
-            } else {
                 success.set(true);
                 return ctx;
+            } else {
+                success.set(false);
+                return c;
             }
         });
 
@@ -339,7 +341,6 @@ public abstract class AbstractPromise<T> implements Promise<T> {
                 try {
                     listener.handle(ctx);
                 } catch (Exception e) {
-                    e.printStackTrace();
                     getLogger().error("Exception caught in promise listener", e);
                 }
             }
diff --git a/futur-reactive-streams/build.gradle.kts b/futur-reactive-streams/build.gradle.kts
index f2b84f3..ddea3d8 100644
--- a/futur-reactive-streams/build.gradle.kts
+++ b/futur-reactive-streams/build.gradle.kts
@@ -6,7 +6,7 @@ plugins {
 }
 
 group = "dev.tommyjs"
-version = "2.1.0"
+version = "2.1.1"
 
 repositories {
     mavenCentral()
diff --git a/futur-reactor/build.gradle.kts b/futur-reactor/build.gradle.kts
index 804b69d..b72f5e3 100644
--- a/futur-reactor/build.gradle.kts
+++ b/futur-reactor/build.gradle.kts
@@ -4,7 +4,7 @@ plugins {
 }
 
 group = "dev.tommyjs"
-version = "2.1.0"
+version = "2.1.1"
 
 repositories {
     mavenCentral()