diff --git a/nflow-engine/src/main/java/io/nflow/engine/internal/workflow/StateExecutionImpl.java b/nflow-engine/src/main/java/io/nflow/engine/internal/workflow/StateExecutionImpl.java
index 0c5a747f2..628769eca 100644
--- a/nflow-engine/src/main/java/io/nflow/engine/internal/workflow/StateExecutionImpl.java
+++ b/nflow-engine/src/main/java/io/nflow/engine/internal/workflow/StateExecutionImpl.java
@@ -1,7 +1,6 @@
 package io.nflow.engine.internal.workflow;
 
 import static java.util.Collections.unmodifiableList;
-import static java.util.stream.Collectors.toList;
 import static org.joda.time.DateTime.now;
 import static org.slf4j.LoggerFactory.getLogger;
 import static org.springframework.util.Assert.notNull;