diff --git a/TddForDB/packages.config b/TddForDB/packages.config
index 78d805d..679254b 100644
--- a/TddForDB/packages.config
+++ b/TddForDB/packages.config
@@ -3,7 +3,7 @@
   <package id="FluentAssertions" version="1.7.0" />
   <package id="FluentNHibernate" version="1.3.0.717" />
   <package id="Iesi.Collections" version="3.2.0.4000" />
-  <package id="NHibernate" version="3.2.0.4000" />
+  <package id="NHibernate" version="3.2.0.4000" targetFramework="net40" />
   <package id="NSubstitute" version="1.3.0.0" />
   <package id="NUnit" version="2.5.10.11092" />
   <package id="Simple.Data.Ado" version="0.12.2.2" />