diff --git a/CBOR.nuspec b/CBOR.nuspec
index e3cd97e0..f56b1a5c 100644
--- a/CBOR.nuspec
+++ b/CBOR.nuspec
@@ -45,7 +45,13 @@ See the project page for release notes on previous versions: https://github.com/
     </releaseNotes>
     <copyright>Written by Peter O. in 2013-2015.  Any copyright is released to the Public Domain.</copyright>
     <tags>cbor data serialization binary json numbers arithmetic</tags>
+   <dependencies> 
+   <group>
+      <dependency id="PeterO.Numbers" version="0.2.0" />
+   </group>
+  </dependencies>
   </metadata>
+
   <files>
     <file src="bin/Release/CBOR.dll" target="lib/portable-net45+dnxcore50+netcore45+win+wpa81+wp80" />
     <file src="bin/Release/CBOR.xml" target="lib/portable-net45+dnxcore50+netcore45+win+wpa81+wp80" />