diff --git a/types/forever-monitor/index.d.ts b/types/forever-monitor/index.d.ts
index caa921fa1a..c9de58e7cc 100644
--- a/types/forever-monitor/index.d.ts
+++ b/types/forever-monitor/index.d.ts
@@ -1,6 +1,7 @@
 // Type definitions for forever-monitor 1.7
 // Project: https://github.com/nodejitsu/forever-monitor#readme
 // Definitions by: Shun Takahashi <https://github.com/shuntksh>
+//                 Will Boyce <https://github.com/wrboyce>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 /// <reference types="node" />
 
@@ -27,7 +28,7 @@ export interface Options {
     watchIgnorePatters?: string[];
     watchDirectory?: string;
     spawnWith?: SpawnWith;
-    env?: { [envKey: string]: string; };
+    env?: NodeJS.ProcessEnv;
     cwd?: string;
     logFile?: string;
     outFile?: string;