diff --git a/version.props b/version.props
index 13a8a7ddcd..2eb5f9cb11 100644
--- a/version.props
+++ b/version.props
@@ -1,6 +1,6 @@
 <Project>
   <PropertyGroup>
-    <VersionPrefix>2.1.2</VersionPrefix>
+    <VersionPrefix>2.1.1</VersionPrefix>
     <VersionSuffix>rtm</VersionSuffix>
     <PackageVersion Condition="'$(IsFinalBuild)' == 'true' AND '$(VersionSuffix)' == 'rtm' ">$(VersionPrefix)</PackageVersion>
     <PackageVersion Condition="'$(IsFinalBuild)' == 'true' AND '$(VersionSuffix)' != 'rtm' ">$(VersionPrefix)-$(VersionSuffix)-final</PackageVersion>
@@ -9,7 +9,7 @@
     <VersionSuffix Condition="'$(VersionSuffix)' != '' And '$(FeatureBranchVersionSuffix)' != ''">$(FeatureBranchVersionPrefix)$(VersionSuffix)-$([System.Text.RegularExpressions.Regex]::Replace('$(FeatureBranchVersionSuffix)', '[^\w-]', '-'))</VersionSuffix>
     <VersionSuffix Condition="'$(VersionSuffix)' != '' And '$(BuildNumber)' != ''">$(VersionSuffix)-$(BuildNumber)</VersionSuffix>
 
-    <ExperimentalVersionPrefix>0.5.2</ExperimentalVersionPrefix>
+    <ExperimentalVersionPrefix>0.5.1</ExperimentalVersionPrefix>
     <ExperimentalVersionSuffix>rtm</ExperimentalVersionSuffix>
     <ExperimentalPackageVersion Condition="'$(IsFinalBuild)' == 'true' AND '$(ExperimentalVersionSuffix)' == 'rtm' ">$(ExperimentalVersionPrefix)</ExperimentalPackageVersion>
     <ExperimentalPackageVersion Condition="'$(IsFinalBuild)' == 'true' AND '$(ExperimentalVersionSuffix)' != 'rtm' ">$(ExperimentalVersionPrefix)-$(ExperimentalVersionSuffix)-final</ExperimentalPackageVersion>