diff --git a/protobuf/2.0/Container.proto b/protobuf/2.0/Container.proto
index b544f28..c69255b 100644
--- a/protobuf/2.0/Container.proto
+++ b/protobuf/2.0/Container.proto
@@ -1,12 +1,13 @@
+syntax = "proto3";
+
 import "./Authentication.proto";
 import "./Message.proto";
 import "./PublishDiscover.proto";
-
-syntax = "proto3";
+import "./KeepAlive.proto";
 
 // Client <-> Server
 message Container {
-    required uint32 id   = 1;
+    required uint32 id = 1;
 
     oneof message {
         AuthenticationRequest  AuthenticationRequest  = 2;
@@ -16,5 +17,6 @@ message Container {
         PublishResponse        PublishResponse        = 6;
         DiscoverRequest        DiscoverRequest        = 7;
         DiscoverResponse       DiscoverResponse       = 8;
+        KeepAlive              KeepAlive              = 9;
     }
 }
diff --git a/protobuf/2.0/KeepAlive.proto b/protobuf/2.0/KeepAlive.proto
new file mode 100644
index 0000000..3c583eb
--- /dev/null
+++ b/protobuf/2.0/KeepAlive.proto
@@ -0,0 +1,7 @@
+syntax = "proto3";
+
+// Server <-> Client
+// data: any data, server ignores this
+message KeepAlive {
+    required uint32 data = 1;
+}