diff --git a/types/bluebird-global/tsconfig.json b/types/bluebird-global/tsconfig.json
index cfea60105c..d037429e0d 100644
--- a/types/bluebird-global/tsconfig.json
+++ b/types/bluebird-global/tsconfig.json
@@ -2,7 +2,7 @@
     "compilerOptions": {
         "module": "commonjs",
         "lib": [
-            "es2018",
+            "es2017",
             "dom"
         ],
         "noImplicitAny": true,