diff --git a/IntroSkipper/Plugin.cs b/IntroSkipper/Plugin.cs
index be31be5..17b030c 100644
--- a/IntroSkipper/Plugin.cs
+++ b/IntroSkipper/Plugin.cs
@@ -111,6 +111,7 @@ public class Plugin : BasePlugin<PluginConfiguration>, IHasWebPages
                 if (serializer.Deserialize(reader) is PluginConfiguration oldConfig)
                 {
                     Instance.UpdateConfiguration(oldConfig);
+                    fileStream.Close();
                     File.Delete(oldConfigFile);
                 }
             }