diff --git a/src/main/java/com/hivemq/embedded/internal/EmbeddedHiveMQBuilderImpl.java b/src/main/java/com/hivemq/embedded/internal/EmbeddedHiveMQBuilderImpl.java
index d1aef5bc3..f9e0a270a 100644
--- a/src/main/java/com/hivemq/embedded/internal/EmbeddedHiveMQBuilderImpl.java
+++ b/src/main/java/com/hivemq/embedded/internal/EmbeddedHiveMQBuilderImpl.java
@@ -62,7 +62,7 @@ public class EmbeddedHiveMQBuilderImpl implements EmbeddedHiveMQBuilder {
     }
 
     @Override
-    public EmbeddedHiveMQBuilder withoutLoggingBootstrap() {
+    public @NotNull EmbeddedHiveMQBuilder withoutLoggingBootstrap() {
         this.enableLoggingBootstrap = false;
         return this;
     }