diff --git a/tools/props/Versions.props b/tools/props/Versions.props
index 23a1eb61ff..68a9ed0beb 100644
--- a/tools/props/Versions.props
+++ b/tools/props/Versions.props
@@ -6,7 +6,7 @@
     <!-- Should only be changed in future when a non-backwards compatible driver is released. -->
     <!-- Future Assembly Version values shall be Major.Minor.0.0; e.g. 4.0.0.0 -->
     <AssemblyVersion>5.0.0.0</AssemblyVersion>
-    <NugetPackageVersion Condition="'$(NugetPackageVersion)' == ''">5.0.0-dev</NugetPackageVersion>
+    <NugetPackageVersion Condition="'$(NugetPackageVersion)' == ''">5.1.0-dev</NugetPackageVersion>
     <Version>$(NugetPackageVersion)</Version>
   </PropertyGroup>
   <PropertyGroup>
@@ -20,7 +20,7 @@
   </PropertyGroup>
   <!-- NetFx project dependencies -->
   <PropertyGroup>
-    <MicrosoftDataSqlClientSniVersion>5.0.0</MicrosoftDataSqlClientSniVersion>    
+    <MicrosoftDataSqlClientSniVersion>5.1.0-preview1.22278.1</MicrosoftDataSqlClientSniVersion>    
     <SystemSecurityCryptographyAlgorithmsVersion>4.3.1</SystemSecurityCryptographyAlgorithmsVersion>
     <SystemSecurityCryptographyPrimitivesVersion>4.3.0</SystemSecurityCryptographyPrimitivesVersion>
   </PropertyGroup>
@@ -38,7 +38,7 @@
   <!-- NetCore project dependencies -->
   <PropertyGroup>
     <MicrosoftWin32RegistryVersion>5.0.0</MicrosoftWin32RegistryVersion>
-    <MicrosoftDataSqlClientSNIRuntimeVersion>5.0.0</MicrosoftDataSqlClientSNIRuntimeVersion>
+    <MicrosoftDataSqlClientSNIRuntimeVersion>5.1.0-preview1.22278.1</MicrosoftDataSqlClientSNIRuntimeVersion>
     <SystemConfigurationConfigurationManagerVersion>5.0.0</SystemConfigurationConfigurationManagerVersion>
     <MicrosoftSqlServerServerVersion>1.0.0</MicrosoftSqlServerServerVersion>
     <SystemDiagnosticsDiagnosticSourceVersion>5.0.0</SystemDiagnosticsDiagnosticSourceVersion>
diff --git a/tools/specs/Microsoft.Data.SqlClient.nuspec b/tools/specs/Microsoft.Data.SqlClient.nuspec
index a9f0b2d6c7..c69ab3eb08 100644
--- a/tools/specs/Microsoft.Data.SqlClient.nuspec
+++ b/tools/specs/Microsoft.Data.SqlClient.nuspec
@@ -11,7 +11,7 @@
     <icon>dotnet.png</icon>
     <repository type="git" url="https://github.com/dotnet/sqlclient" />
     <description>Provides the data provider for SQL Server. These classes provide access to versions of SQL Server and encapsulate database-specific protocols, including tabular data stream (TDS)
-
+    
 Commonly Used Types:
 Microsoft.Data.SqlClient.SqlConnection
 Microsoft.Data.SqlClient.SqlException
@@ -28,7 +28,7 @@ When using NuGet 3.x this package requires at least version 3.4.</description>
     <tags>sqlclient microsoft.data.sqlclient</tags>
     <dependencies>
       <group targetFramework="net462">
-        <dependency id="Microsoft.Data.SqlClient.SNI" version="5.0.0" />
+        <dependency id="Microsoft.Data.SqlClient.SNI" version="5.1.0-preview1.22278.1" />
         <dependency id="Azure.Identity" version="1.6.0" />
         <dependency id="Microsoft.Identity.Client" version="4.45.0" />
         <dependency id="Microsoft.IdentityModel.JsonWebTokens" version="6.21.0" />
@@ -42,7 +42,7 @@ When using NuGet 3.x this package requires at least version 3.4.</description>
         <dependency id="System.Text.Encodings.Web" version="4.7.2" />
       </group>
       <group targetFramework="netcoreapp3.1">
-        <dependency id="Microsoft.Data.SqlClient.SNI.runtime" version="5.0.0" exclude="Compile" />
+        <dependency id="Microsoft.Data.SqlClient.SNI.runtime" version="5.1.0-preview1.22278.1" exclude="Compile" />
         <dependency id="Azure.Identity" version="1.6.0" />
         <dependency id="Microsoft.Identity.Client" version="4.45.0" exclude="Compile"/>
         <dependency id="Microsoft.IdentityModel.Protocols.OpenIdConnect" version="6.21.0" />
@@ -61,7 +61,7 @@ When using NuGet 3.x this package requires at least version 3.4.</description>
         <dependency id="System.Security.Principal.Windows" version="5.0.0" exclude="Compile" />
       </group>
       <group targetFramework="netstandard2.0">
-        <dependency id="Microsoft.Data.SqlClient.SNI.runtime" version="5.0.0" exclude="Compile" />
+        <dependency id="Microsoft.Data.SqlClient.SNI.runtime" version="5.1.0-preview1.22278.1" exclude="Compile" />
         <dependency id="Azure.Identity" version="1.6.0" />
         <dependency id="Microsoft.Identity.Client" version="4.45.0" exclude="Compile"/>
         <dependency id="Microsoft.IdentityModel.Protocols.OpenIdConnect" version="6.21.0" />
@@ -80,7 +80,7 @@ When using NuGet 3.x this package requires at least version 3.4.</description>
         <dependency id="System.Security.Principal.Windows" version="5.0.0" exclude="Compile" />
       </group>
       <group targetFramework="netstandard2.1">
-        <dependency id="Microsoft.Data.SqlClient.SNI.runtime" version="5.0.0" exclude="Compile" />
+        <dependency id="Microsoft.Data.SqlClient.SNI.runtime" version="5.1.0-preview1.22278.1" exclude="Compile" />
         <dependency id="Azure.Identity" version="1.6.0" />
         <dependency id="Microsoft.Identity.Client" version="4.45.0" exclude="Compile"/>
         <dependency id="Microsoft.IdentityModel.Protocols.OpenIdConnect" version="6.21.0" />