diff --git a/package.json b/package.json
index c9fbe0b..1143648 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@iflix/json-rules-engine",
-  "version": "4.0.0",
+  "version": "4.0.1",
   "description": "Rules Engine expressed in simple json",
   "main": "dist/index.js",
   "scripts": {
diff --git a/src/engine.js b/src/engine.js
index 9723889..5052a6b 100644
--- a/src/engine.js
+++ b/src/engine.js
@@ -198,7 +198,7 @@ class Engine extends EventEmitter {
           this.emit('failure', rule.event, almanac, ruleResult)
         }
       }).catch((error) => {
-        this.emit('error', error)
+        this.listenerCount('error') > 0 && this.emit('error', error)
         throw error
       })
     }))
@@ -224,7 +224,7 @@ class Engine extends EventEmitter {
       debug(`engine::run ruleResult:${ruleResult.result}`)
       return ruleResult
     }).catch((error) => {
-      this.emit('error', error)
+      this.listenerCount('error') > 0 && this.emit('error', error)
       throw error
     })
   }
diff --git a/src/rule.js b/src/rule.js
index c3ceb1d..5687011 100644
--- a/src/rule.js
+++ b/src/rule.js
@@ -275,7 +275,7 @@ class Rule extends EventEmitter {
       error.rule = {
         name: this.name
       }
-      this.emit('error', error)
+      this.listenerCount('error') > 0 && this.emit('error', error)
       throw error
     }