diff --git a/plugin/grpc_server/README.md b/plugin/grpc_server/README.md
index 1a19bb1f6..f85758411 100644
--- a/plugin/grpc_server/README.md
+++ b/plugin/grpc_server/README.md
@@ -14,8 +14,8 @@ This plugin can only be used once per gRPC listener block.
 
 ```txt
 grpc_server {
-    max_streams POSITIVE_INTEGER
-    max_connections POSITIVE_INTEGER
+    max_streams NON_NEGATIVE_INTEGER
+    max_connections NON_NEGATIVE_INTEGER
 }
 ```