diff --git a/lib/plugin.js b/lib/plugin.js
index 554062a..5dc97c7 100644
--- a/lib/plugin.js
+++ b/lib/plugin.js
@@ -168,7 +168,8 @@ class SVGSpritePlugin {
 
           compilation.assets[`${this.filenamePrefix}${filename}`] = {
             source() { return content; },
-            size() { return content.length; }
+            size() { return content.length; },
+            updateHash(bulkUpdateDecorator) { bulkUpdateDecorator.update(content); }
           };
         });
     });