diff --git a/osu.Game.Rulesets.Karaoke/Beatmaps/Formats/KaraokeJsonBeatmapDecoder.cs b/osu.Game.Rulesets.Karaoke/Beatmaps/Formats/KaraokeJsonBeatmapDecoder.cs
index 4a00678b3..99991f8a7 100644
--- a/osu.Game.Rulesets.Karaoke/Beatmaps/Formats/KaraokeJsonBeatmapDecoder.cs
+++ b/osu.Game.Rulesets.Karaoke/Beatmaps/Formats/KaraokeJsonBeatmapDecoder.cs
@@ -42,7 +42,7 @@ protected override void ParseStreamInto(LineBufferedReader stream, Beatmap outpu
             globalSetting.PreserveReferencesHandling = PreserveReferencesHandling.Objects;
 
             // should not let json decoder to read this line.
-            if (stream.PeekLine().Contains("// karaoke json file format v"))
+            if (stream.PeekLine()?.Contains("// karaoke json file format v") ?? false)
             {
                 stream.ReadLine();
             }
diff --git a/osu.Game.Rulesets.Karaoke/osu.Game.Rulesets.Karaoke.csproj b/osu.Game.Rulesets.Karaoke/osu.Game.Rulesets.Karaoke.csproj
index e4e7c488f..cbb3df880 100644
--- a/osu.Game.Rulesets.Karaoke/osu.Game.Rulesets.Karaoke.csproj
+++ b/osu.Game.Rulesets.Karaoke/osu.Game.Rulesets.Karaoke.csproj
@@ -19,7 +19,7 @@
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
-    <PackageReference Include="ppy.osu.Game" Version="2022.704.0" />
+    <PackageReference Include="ppy.osu.Game" Version="2022.709.1" />
     <PackageReference Include="Lucene.Net" Version="4.8.0-beta00016" />
     <PackageReference Include="Lucene.Net.Analysis.Kuromoji" Version="4.8.0-beta00016" />
     <PackageReference Include="NicoKaraParser" Version="1.1.0" />