Added slack source in the example list
diff --git a/README.adoc b/README.adoc
index 04aed48..254c547 100644
--- a/README.adoc
+++ b/README.adoc
@@ -10,9 +10,10 @@
 - AWS2-SNS sink example
 - AWS2-SQS source and sink examples
 - CQL source and sink example
+- File source and sink example
 - Infinispan source and sink example
 - MinIO source and sink example
 - Nats source and sink example
 - NSQ source and sink example
-- File source and sink example
 - RabbitMQ source and sink example
+- Slack source example