diff --git a/lib/index.js b/lib/index.js
index d6002d7..d9942dd 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -111,8 +111,12 @@ module.exports = (limit) => {
           const step = this.steps[this.steps.keys()[task.step]]
 
           task.state = 'running'
+          const thisStep = task.step
 
           task.timeout = setTimeout(() => {
+            if (task.step !== thisStep) {
+              return
+            }
             if (task.abort && task.abort.constructor === Function) {
               task.abort()
             }
@@ -123,10 +127,16 @@ module.exports = (limit) => {
           task.abort = step.run(
             task,
             data => {
+              if (task.step !== thisStep) {
+                return
+              }
               task.completeStep(data)
               this.debounceRun()
             },
             error => {
+              if (task.step !== thisStep) {
+                return
+              }
               task.error(error)
               this.debounceRun()
             }