diff --git a/packages/server/src/util.js b/packages/server/src/util.js
index e181351c8..43ba3424a 100644
--- a/packages/server/src/util.js
+++ b/packages/server/src/util.js
@@ -1,5 +1,6 @@
 export const clearModuleCache = moduleName => {
-  const m = require.cache[moduleName]
+  const cache = (typeof __non_webpack_require__ !== 'undefined' ? __non_webpack_require__ : require).cache;
+  const m = cache[moduleName]
   if (m) {
     // remove self from own parents
     if (m.parent && m.parent.children) {
@@ -13,7 +14,7 @@ export const clearModuleCache = moduleName => {
         }
       })
     }
-    delete require.cache[moduleName]
+    delete cache[moduleName]
   }
 }