diff --git a/src/ZeroLog.Impl.Full/ZeroLog.Impl.Full.csproj b/src/ZeroLog.Impl.Full/ZeroLog.Impl.Full.csproj
index 62dbb61..75fe50f 100644
--- a/src/ZeroLog.Impl.Full/ZeroLog.Impl.Full.csproj
+++ b/src/ZeroLog.Impl.Full/ZeroLog.Impl.Full.csproj
@@ -11,7 +11,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Backport.System.Threading.Lock" Version="3.0.1">
+    <PackageReference Include="Backport.System.Threading.Lock" Version="3.0.3">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>analyzers</IncludeAssets>
     </PackageReference>