diff --git a/src/main/java/com/splunk/logging/HttpEventCollectorLogbackAppender.java b/src/main/java/com/splunk/logging/HttpEventCollectorLogbackAppender.java
index 9ac376bf..62369ea6 100644
--- a/src/main/java/com/splunk/logging/HttpEventCollectorLogbackAppender.java
+++ b/src/main/java/com/splunk/logging/HttpEventCollectorLogbackAppender.java
@@ -107,7 +107,7 @@ public void start() {
     public void stop() {
         if (!started)
             return;
-        this.sender.flush();
+        this.sender.close();
         super.stop();
     }