diff --git a/web/lib/avro-js.d.ts b/web/lib/avro-js.d.ts
new file mode 100644
--- /dev/null
+++ b/web/lib/avro-js.d.ts
@@ -0,0 +1,10 @@
+declare module "avro-js" {
+    export namespace types {
+        interface Type {
+            fromBuffer(buffer: Buffer): Record;
+        }
+        type Record = any;
+    }
+
+    export function parse(schema: any): types.Type;
+}
\ No newline at end of file