diff --git a/javascript/tokenscript-viewer/src/assets/test-iframe-provider.html b/javascript/tokenscript-viewer/src/assets/test-iframe-provider.html
index 13ec049e..8b39a618 100644
--- a/javascript/tokenscript-viewer/src/assets/test-iframe-provider.html
+++ b/javascript/tokenscript-viewer/src/assets/test-iframe-provider.html
@@ -28,6 +28,7 @@
 							sendResponse(message.data, accounts);
 							break;
 						case "eth_chainId":
+						case "net_version":
 						case "eth_blockNumber":
 						case "eth_estimateGas":
 						case "eth_sendTransaction":
diff --git a/test-iframe-provider.html b/test-iframe-provider.html
index 843da9d6..561551b6 100644
--- a/test-iframe-provider.html
+++ b/test-iframe-provider.html
@@ -28,6 +28,7 @@
 							sendResponse(message.data, accounts);
 							break;
 						case "eth_chainId":
+						case "net_version":
 						case "eth_blockNumber":
 						case "eth_estimateGas":
 						case "eth_sendTransaction":