diff --git a/build/Targets/Versions.props b/build/Targets/Versions.props
index 7bd4b0994d7e0f3e9acaf8bc85732dcdb72e47b5..e51bbf20a34fbf40e181a64e279088c20690f2a3 100644
--- a/build/Targets/Versions.props
+++ b/build/Targets/Versions.props
@@ -15,8 +15,7 @@
     <!-- The release moniker for our packages.  Developers should use "dev" and official builds pick the branch
          moniker listed below -->
     <RoslynNuGetMoniker Condition="'$(RoslynNuGetMoniker)' == ''">dev</RoslynNuGetMoniker>
-    <!-- PROTOTYPE(readonlyRefs) This needs to be reverted before merging to master -->
-    <RoslynNuGetMoniker Condition="'$(OfficialBuild)' == 'true'">rdonly-ref</RoslynNuGetMoniker>
+    <RoslynNuGetMoniker Condition="'$(OfficialBuild)' == 'true'">beta1</RoslynNuGetMoniker> 
     <!-- This is the base of the NuGet versioning for prerelease packages -->
     <NuGetPreReleaseVersion>$(RoslynFileVersionBase)-$(RoslynNuGetMoniker)</NuGetPreReleaseVersion>