diff --git a/server/index.js b/server/index.js
index 9cb8c48b0..b1c95014b 100644
--- a/server/index.js
+++ b/server/index.js
@@ -97,7 +97,7 @@ module.exports = options => {
 	// verification that expected assets exist
 	if (options.withAssets) {
 		const assetManager = assets.init(options, meta.directory, app.locals);
-		app.getHashedAssetUrl = assetManager.hasher.get;
+		app.getHashedAssetUrl = assetManager.hasher;
 		app.use(assetManager.middleware);
 	}