diff --git a/src/pages/guide/node/system-requirements.mdx b/src/pages/guide/node/system-requirements.mdx
index 0b43ca76..f2a89423 100644
--- a/src/pages/guide/node/system-requirements.mdx
+++ b/src/pages/guide/node/system-requirements.mdx
@@ -56,6 +56,6 @@ We do not recommend using a cloud firewall / NAT gateway as it can introduce add
 |------|----------|---------|--------|
 | 30303 | TCP/UDP | Execution P2P | Public |
 | 8000 | TCP | Consensus P2P | Validators only |
-| 8545 | TCP | HTTP RPC | Optional |
-| 8546 | TCP | WebSocket RPC | Optional |
+| 8545 | TCP | HTTP RPC | Optional (internal for validators) |
+| 8546 | TCP | WebSocket RPC | Optional (internal for validators) |
 | 9000 | TCP | Metrics | Internal |