diff --git a/ipc/internal.proto b/ipc/internal.proto
index 23af3a7..f16fa79 100644
--- a/ipc/internal.proto
+++ b/ipc/internal.proto
@@ -13,12 +13,6 @@ message RenderResponse {
     uint64 len = 302;
     bytes data = 303;
 };
-message Ping {
-	bytes data = 1;
-};
-message Pong {
-	bytes data = 1;
-};
 message LogMessage {
     uint64 timespec = 6000;
     uint32 level = 6001;
@@ -51,8 +45,6 @@ message RPCCall {
 		QuitCmd quit = 6;
 		InitCommand init = 7;
 		GetPropertyListCommand get_property_list = 8;
-		Ping = 9;
-		Pong = 10;
 	};
 };
 message PropertyList {
@@ -67,7 +59,5 @@ message RPCResponse {
 	ResetResponse reset = 5;
 	ErrorResponse err = 6;
 	PropertyList property_list = 7;
-	Ping = 8;
-	Pong = 9;
 	};
 };