diff --git a/NHibernate.Spatial/NHibernate.Spatial.csproj b/NHibernate.Spatial/NHibernate.Spatial.csproj
index e192a59..b8eb37a 100644
--- a/NHibernate.Spatial/NHibernate.Spatial.csproj
+++ b/NHibernate.Spatial/NHibernate.Spatial.csproj
@@ -11,7 +11,7 @@
   <ItemGroup>
     <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.1.1" PrivateAssets="All" />
     <PackageReference Include="NetTopologySuite" Version="2.5.0" />
-    <PackageReference Include="NHibernate" Version="5.3.12" />
+    <PackageReference Include="NHibernate" Version="5.4.9" />
   </ItemGroup>
 
 </Project>