diff --git a/code/websites/pokedex.online/src/views/GamemasterExplorer.vue b/code/websites/pokedex.online/src/views/GamemasterExplorer.vue
index 9c75bd4..8ebef96 100644
--- a/code/websites/pokedex.online/src/views/GamemasterExplorer.vue
+++ b/code/websites/pokedex.online/src/views/GamemasterExplorer.vue
@@ -696,8 +696,11 @@ const onSearchInput = debounce(async () => {
     requestId
   });
 
+  // Convert reactive array to plain array (Web Workers can't clone Vue proxies)
+  const plainLines = Array.from(fileLines.value);
+  
   searchWorker.postMessage({
-    lines: fileLines.value,
+    lines: plainLines,
     searchTerm: searchTerm,
     id: requestId
   });