diff --git a/.gitmodules b/.gitmodules
index c17c3464..0d99efd5 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,9 @@
 [submodule "packages/grpc-tools/deps/protobuf"]
 	path = packages/grpc-tools/deps/protobuf
 	url = https://github.com/protocolbuffers/protobuf
+[submodule "packages/grpc-js/deps/envoy-api"]
+	path = packages/grpc-js/deps/envoy-api
+	url = https://github.com/envoyproxy/data-plane-api.git
+[submodule "packages/grpc-js/deps/udpa"]
+	path = packages/grpc-js/deps/udpa
+	url = https://github.com/cncf/udpa.git
diff --git a/packages/grpc-js/deps/envoy-api b/packages/grpc-js/deps/envoy-api
new file mode 160000
index 00000000..50cef8fc
--- /dev/null
+++ b/packages/grpc-js/deps/envoy-api
@@ -0,0 +1 @@
+Subproject commit 50cef8fcab37ba59a61068934d08a3f4c28a681f
diff --git a/packages/grpc-js/deps/udpa b/packages/grpc-js/deps/udpa
new file mode 160000
index 00000000..3b31d022
--- /dev/null
+++ b/packages/grpc-js/deps/udpa
@@ -0,0 +1 @@
+Subproject commit 3b31d022a144b334eb2224838e4d6952ab5253aa
diff --git a/packages/grpc-js/package.json b/packages/grpc-js/package.json
index 3d17f9a3..86243b30 100644
--- a/packages/grpc-js/package.json
+++ b/packages/grpc-js/package.json
@@ -15,7 +15,7 @@
   "types": "build/src/index.d.ts",
   "license": "Apache-2.0",
   "devDependencies": {
-    "@grpc/proto-loader": "^0.5.0",
+    "@grpc/proto-loader": "^0.5.4",
     "@types/gulp": "^4.0.6",
     "@types/gulp-mocha": "0.0.32",
     "@types/lodash": "^4.14.108",
@@ -65,6 +65,8 @@
   "files": [
     "src/*.ts",
     "build/src/*.{js,d.ts,js.map}",
-    "LICENSE"
+    "LICENSE",
+    "deps/envoy-api/envoy/**/*.proto",
+    "deps/udpa/udpa/**/*.proto"
   ]
 }