diff --git a/Albireo.Otp/Albireo.Otp.nuspec b/Albireo.Otp/Albireo.Otp.nuspec
index f121d66..6445d2e 100644
--- a/Albireo.Otp/Albireo.Otp.nuspec
+++ b/Albireo.Otp/Albireo.Otp.nuspec
@@ -6,11 +6,7 @@
     <title>Albireo's HOTP and TOTP authentication library</title>
     <authors>$author$</authors>
     <description>$description$</description>
-    <releaseNotes>
-        Add the possibility to choose the hashing algorithm used in the one-time code computation.
-        This is a breaking change because it modifies the methods signatures.
-        The previous fixed hashing algorithm was SHA1.
-    </releaseNotes>
+    <releaseNotes>The library has been downgraded to .NET framework 4.0 to allow usage on older projects.</releaseNotes>
     <summary>A library for HOTP and TOTP authentication.</summary>
     <projectUrl>https://github.com/kappa7194/otp</projectUrl>
     <iconUrl>http://i.imgur.com/Nxg6TU5.png</iconUrl>
diff --git a/Albireo.Otp/Properties/AssemblyInfo.cs b/Albireo.Otp/Properties/AssemblyInfo.cs
index 3aed873..d4d045a 100644
--- a/Albireo.Otp/Properties/AssemblyInfo.cs
+++ b/Albireo.Otp/Properties/AssemblyInfo.cs
@@ -11,5 +11,5 @@
 [assembly: AssemblyCulture("")]
 [assembly: ComVisible(false)]
 [assembly: Guid("9bedccab-dfe2-48c2-8a6c-ef9443bc730a")]
-[assembly: AssemblyVersion("2.0.0")]
-[assembly: AssemblyFileVersion("2.0.0")]
+[assembly: AssemblyVersion("2.1.0")]
+[assembly: AssemblyFileVersion("2.1.0")]