diff --git a/.babelrc b/.babelrc
index 7cdd358..fc69aa9 100644
--- a/.babelrc
+++ b/.babelrc
@@ -13,6 +13,7 @@
   "plugins": [
     "@babel/plugin-proposal-object-rest-spread",
     "@babel/plugin-proposal-export-default-from",
-    "@babel/plugin-proposal-async-generator-functions"
+    "@babel/plugin-proposal-async-generator-functions",
+    "@babel/plugin-proposal-class-properties"
   ]
 }
diff --git a/src/@types/it-pb-rpc/index.d.ts b/src/@types/it-pb-rpc/index.d.ts
deleted file mode 100644
index 3424cf9..0000000
--- a/src/@types/it-pb-rpc/index.d.ts
+++ /dev/null
@@ -1,15 +0,0 @@
-declare module "it-pb-rpc" {
-  import { Buffer } from "buffer";
-  import { Duplex } from "it-pair";
-  type WrappedDuplex = {
-    read(bytes?: number): Promise<Buffer>;
-    readLP(): Promise<Buffer>;
-    write(input: Buffer): void;
-    writeLP(input: Buffer): void;
-    unwrap(): Duplex;
-  }
-
-  function Wrap (duplex: any): WrappedDuplex;
-
-  export = Wrap;
-}
diff --git a/tsconfig.json b/tsconfig.json
index 034987e..075738e 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -16,6 +16,7 @@
     "**/src/**/*.ts"
   ],
   "exclude": [
-    "node_modules"
+    "node_modules",
+    "./src/@types"
   ]
 }