diff --git a/app/global.d.ts b/app/global.d.ts
new file mode 100644
index 0000000..d8f7a69
--- /dev/null
+++ b/app/global.d.ts
@@ -0,0 +1,9 @@
+/// <reference types="vite/client" />
+
+interface Window {
+  ethereum: import("ethers").Eip1193Provider & {
+    on: (event: string, cb: (param: any) => any) => void;
+  };
+  fhevmjs: import("fhevmjs");
+  fhevmjsInitialized: boolean;
+}