diff --git a/bluesky-post-latest-image.csproj b/bluesky-post-latest-image.csproj
index 486efa8..e411807 100644
--- a/bluesky-post-latest-image.csproj
+++ b/bluesky-post-latest-image.csproj
@@ -10,7 +10,7 @@
 
   <ItemGroup>
     <PackageReference Include="idunno.Bluesky" Version="1.8.0" />
-    <PackageReference Include="SixLabors.ImageSharp" Version="3.1.12" />
+    <PackageReference Include="SixLabors.ImageSharp" Version="4.0.0" />
   </ItemGroup>
 
 </Project>