diff --git a/server/build/webpack.js b/server/build/webpack.js
index 4cddfdf2..1ea8c112 100644
--- a/server/build/webpack.js
+++ b/server/build/webpack.js
@@ -238,9 +238,9 @@ export default async function getBaseWebpackConfig (dir, {dev = false, isServer
             toplevel: false,
             typeofs: false,
             unused: false,
-            conditionals: false,
+            conditionals: true,
             dead_code: true,
-            evaluate: false
+            evaluate: true
           }
         }
       }),