diff --git a/ape_infura/provider.py b/ape_infura/provider.py
index 44cf487..ea6966d 100644
--- a/ape_infura/provider.py
+++ b/ape_infura/provider.py
@@ -13,6 +13,8 @@
 # NOTE: https://docs.infura.io/learn/websockets#supported-networks
 _WEBSOCKET_CAPABLE_ECOSYSTEMS = {
     "ethereum",
+    "arbitrum",
+    "optimism",
     "polygon",
     "linea",
 }