diff --git a/dynamic-engine/src/main/java/com/pranavpandey/android/dynamic/engine/task/DynamicAppMonitor.java b/dynamic-engine/src/main/java/com/pranavpandey/android/dynamic/engine/task/DynamicAppMonitor.java
index a717465..0f9acdd 100644
--- a/dynamic-engine/src/main/java/com/pranavpandey/android/dynamic/engine/task/DynamicAppMonitor.java
+++ b/dynamic-engine/src/main/java/com/pranavpandey/android/dynamic/engine/task/DynamicAppMonitor.java
@@ -190,7 +190,8 @@ protected void onCancelled() {
      * @param event The accessibility event.
      */
     public void onAccessibilityEvent(@Nullable AccessibilityEvent event) {
-        if (!isRunning() || isPaused() || event == null) {
+        if (!isRunning() || isPaused() || event == null
+                || event.getPackageName() == null || event.getClassName() == null) {
             return;
         }