diff --git a/packages/common/package.json b/packages/common/package.json
index 78740bfd..f4e12ea1 100644
--- a/packages/common/package.json
+++ b/packages/common/package.json
@@ -26,6 +26,7 @@
   "dependencies": {
     "dotenv": "^6.2.0",
     "rxjs": "^6.3.1",
+    "tslib": "^2.0.0",
     "zones": "0.0.1"
   },
   "peerDependencies": {
diff --git a/tsconfig.json b/tsconfig.json
index 93c811ca..e5936362 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -7,6 +7,7 @@
 		"module": "commonjs",
 		"moduleResolution": "node",
 		"preserveSymlinks": true,
+        "importHelpers": true,
 		"typeRoots": [
 			"./node_modules/@types"
 		],