diff --git a/Lib.Audio/Lib.Audio.csproj b/Lib.Audio/Lib.Audio.csproj
index 4ae0bb8..ec0b4d6 100644
--- a/Lib.Audio/Lib.Audio.csproj
+++ b/Lib.Audio/Lib.Audio.csproj
@@ -2,6 +2,7 @@
 
     <PropertyGroup>
         <TargetFramework>net5.0</TargetFramework>
+        <Nullable>enable</Nullable>
     </PropertyGroup>
 
     <ItemGroup>