diff --git a/index.d.ts b/index.d.ts
index dfcaf073d..d909be908 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -1,3 +1,5 @@
+/// <reference types="node"/>
+
 export interface ObservableLike {
 	subscribe(observer: (value: unknown) => void): void;
 	[Symbol.observable](): ObservableLike;
diff --git a/package-lock.json b/package-lock.json
index d61c8c5e5..38603161a 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -588,9 +588,9 @@
       "integrity": "sha512-tHq6qdbT9U1IRSGf14CL0pUlULksvY9OZ+5eEgl1N7t+OA3tGvNpxJCzuKQlsNgCVwbAs670L1vcVQi8j9HjnA=="
     },
     "@types/node": {
-      "version": "11.13.6",
-      "resolved": "https://registry.npmjs.org/@types/node/-/node-11.13.6.tgz",
-      "integrity": "sha512-Xoo/EBzEe8HxTSwaZNLZjaW6M6tA/+GmD3/DZ6uo8qSaolE/9Oarko0oV1fVfrLqOz0tx0nXJB4rdD5c+vixLw=="
+      "version": "12.0.5",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-12.0.5.tgz",
+      "integrity": "sha512-CFLSALoE+93+Hcb5pFjp0J1uMrrbLRe+L1+gFwerJ776R3TACSF0kTVRQ7AvRa7aFx70nqYHAc7wQPlt9kY2Mg=="
     },
     "abbrev": {
       "version": "1.1.0",
diff --git a/package.json b/package.json
index a8a645794..bc42cb816 100644
--- a/package.json
+++ b/package.json
@@ -135,6 +135,7 @@
 		"write-file-atomic": "^3.0.0"
 	},
 	"devDependencies": {
+		"@types/node": "^8.10.49",
 		"cli-table3": "^0.5.1",
 		"codecov": "^3.5.0",
 		"delay": "^4.2.0",
diff --git a/test/ts-types/tsconfig.json b/test/ts-types/tsconfig.json
index fe3111fbc..c6cf0468b 100644
--- a/test/ts-types/tsconfig.json
+++ b/test/ts-types/tsconfig.json
@@ -1,7 +1,7 @@
 {
-  "compilerOptions": {
-    "module": "commonjs",
-    "target": "ES2017",
-    "strict": true
-  }
+	"compilerOptions": {
+		"module": "commonjs",
+		"target": "es2017",
+		"strict": true
+	}
 }