diff --git a/Wox.Infrastructure/Storage/JsonStorage.cs b/Wox.Infrastructure/Storage/JsonStorage.cs
index 054f34098c..29c6f509ef 100644
--- a/Wox.Infrastructure/Storage/JsonStorage.cs
+++ b/Wox.Infrastructure/Storage/JsonStorage.cs
@@ -55,7 +55,7 @@ namespace Wox.Infrastructure.Storage
         {
             try
             {
-                _data = JsonConvert.DeserializeObject<T>(searlized, _serializerSettings);
+                _data = JsonConvert.DeserializeObject<T>(searlized, _serializerSettings).NonNull();
             }
             catch (JsonSerializationException e)
             {