diff --git a/src/FluentNHibernate/FluentNHibernate.csproj b/src/FluentNHibernate/FluentNHibernate.csproj
index 77bf0d978..e772d1be2 100644
--- a/src/FluentNHibernate/FluentNHibernate.csproj
+++ b/src/FluentNHibernate/FluentNHibernate.csproj
@@ -11,7 +11,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="NHibernate" Version="5.3.3" />
+    <PackageReference Include="NHibernate" Version="5.5.0" />
   </ItemGroup>
 
   <ItemGroup>