diff --git a/tools/aconfig/protos/aconfig.proto b/tools/aconfig/protos/aconfig.proto
index 9f6424f..b59fdfc 100644
--- a/tools/aconfig/protos/aconfig.proto
+++ b/tools/aconfig/protos/aconfig.proto
@@ -35,21 +35,21 @@
 // aconfig input messages: flag declarations and values
 
 message flag_declaration {
-  required string name = 1;
-  required string namespace = 2;
-  required string description = 3;
+  optional string name = 1;
+  optional string namespace = 2;
+  optional string description = 3;
 };
 
 message flag_declarations {
-  required string package = 1;
+  optional string package = 1;
   repeated flag_declaration flag = 2;
 };
 
 message flag_value {
-  required string package = 1;
-  required string name = 2;
-  required flag_state state = 3;
-  required flag_permission permission = 4;
+  optional string package = 1;
+  optional string name = 2;
+  optional flag_state state = 3;
+  optional flag_permission permission = 4;
 };
 
 message flag_values {
@@ -60,18 +60,18 @@
 
 message tracepoint {
   // path to declaration or value file relative to $TOP
-  required string source = 1;
-  required flag_state state = 2;
-  required flag_permission permission = 3;
+  optional string source = 1;
+  optional flag_state state = 2;
+  optional flag_permission permission = 3;
 }
 
 message parsed_flag {
-  required string package = 1;
-  required string name = 2;
-  required string namespace = 3;
-  required string description = 4;
-  required flag_state state = 5;
-  required flag_permission permission = 6;
+  optional string package = 1;
+  optional string name = 2;
+  optional string namespace = 3;
+  optional string description = 4;
+  optional flag_state state = 5;
+  optional flag_permission permission = 6;
   repeated tracepoint trace = 7;
 }