diff --git a/core/src/rpc_pubsub_service.rs b/core/src/rpc_pubsub_service.rs
index c1c5fee152..98b80ee93b 100644
--- a/core/src/rpc_pubsub_service.rs
+++ b/core/src/rpc_pubsub_service.rs
@@ -37,6 +37,8 @@ impl PubSubService {
                         });
                         session
                 })
+                .max_connections(1000) // Arbitrary, default of 100 is too low
+                .max_payload(10 * 1024 * 1024 + 1024) // max account size (10MB) + extra (1K)
                 .start(&pubsub_addr);
 
                 if let Err(e) = server {