diff --git a/docs/deprecations.md b/docs/deprecations.md
index 5093d3b61..b551e3c38 100644
--- a/docs/deprecations.md
+++ b/docs/deprecations.md
@@ -6,6 +6,12 @@ layout: Doc
 
 # Serverless Framework Deprecations
 
+<a name="SERVICE_OBJECT_NOTATION"><div>&nbsp;</div></a>
+
+## `service` property object notation
+
+Starting with v3.0.0, object notation for `service` property will no longer be recognized. Set `service` property directly with service name.
+
 <a name="CLOUDFRONT_CACHE_BEHAVIOR_FORWARDED_VALUES_AND_TTL"><div>&nbsp;</div></a>
 
 ## `cloudFront` event `behavior.ForwardedValues` property
diff --git a/lib/classes/Service.js b/lib/classes/Service.js
index f4913a339..26cecf349 100644
--- a/lib/classes/Service.js
+++ b/lib/classes/Service.js
@@ -131,6 +131,11 @@ class Service {
     }
 
     if (_.isObject(serverlessFile.service)) {
+      this.serverless._logDeprecation(
+        'SERVICE_OBJECT_NOTATION',
+        'Starting from next major object notation for "service" property will no longer be ' +
+          'recognized. Set "service" property directly with service name.'
+      );
       this.serviceObject = serverlessFile.service;
       this.service = serverlessFile.service.name;
     } else {