diff --git a/client/src/global.d.ts b/client/src/global.d.ts
index bff94710c..97ed3c462 100644
--- a/client/src/global.d.ts
+++ b/client/src/global.d.ts
@@ -1 +1,7 @@
 declare module '*.svg';
+
+declare namespace NodeJS {
+  interface ProcessEnv {
+    readonly NODE_ENV: 'development' | 'production' | 'test';
+  }
+}