diff --git a/BuildToolsVersion.txt b/BuildToolsVersion.txt
index b4b13a33dfd8..c754229440a1 100644
--- a/BuildToolsVersion.txt
+++ b/BuildToolsVersion.txt
@@ -1 +1 @@
-2.1.0-preview2-02612-03
+2.1.0-preview3-02616-02
diff --git a/dependencies.props b/dependencies.props
index e4ba83ca2387..53d01b09af24 100644
--- a/dependencies.props
+++ b/dependencies.props
@@ -9,15 +9,15 @@
        These ref versions are pulled from https://github.com/dotnet/versions.
   -->
   <PropertyGroup>
-    <CoreFxCurrentRef>6ee8780dffdb35ed08d4377a1c8594da7bdfe3ed</CoreFxCurrentRef>
-    <CoreClrCurrentRef>6ee8780dffdb35ed08d4377a1c8594da7bdfe3ed</CoreClrCurrentRef>
-    <CoreSetupCurrentRef>6ee8780dffdb35ed08d4377a1c8594da7bdfe3ed</CoreSetupCurrentRef>
+    <CoreFxCurrentRef>23dd02fbf9e8710327d85d7a152ef4cf61456bad</CoreFxCurrentRef>
+    <CoreClrCurrentRef>23dd02fbf9e8710327d85d7a152ef4cf61456bad</CoreClrCurrentRef>
+    <CoreSetupCurrentRef>23dd02fbf9e8710327d85d7a152ef4cf61456bad</CoreSetupCurrentRef>
     <ExternalCurrentRef>96dc7805f5df4a70a55783964ce69dcd91bfca80</ExternalCurrentRef>
     <ProjectNTfsCurrentRef>6ee8780dffdb35ed08d4377a1c8594da7bdfe3ed</ProjectNTfsCurrentRef>
-    <ProjectNTfsTestILCCurrentRef>6ee8780dffdb35ed08d4377a1c8594da7bdfe3ed</ProjectNTfsTestILCCurrentRef>
+    <ProjectNTfsTestILCCurrentRef>23dd02fbf9e8710327d85d7a152ef4cf61456bad</ProjectNTfsTestILCCurrentRef>
     <SniCurrentRef>8bd1ec5fac9f0eec34ff6b34b1d878b4359e02dd</SniCurrentRef>
     <StandardCurrentRef>6298244e25cf84d91e3cda9627315f2425274624</StandardCurrentRef>
-    <BuildToolsCurrentRef>8654ee51dcd86c19a049716f506516cba29956e0</BuildToolsCurrentRef>
+    <BuildToolsCurrentRef>23dd02fbf9e8710327d85d7a152ef4cf61456bad</BuildToolsCurrentRef>
   </PropertyGroup>
 
   <!-- Product dependency versions. -->
@@ -31,16 +31,16 @@
 
   <!-- Tests/infrastructure dependency versions. -->
   <PropertyGroup>
-    <CoreFxExpectedPrerelease>preview2-26314-06</CoreFxExpectedPrerelease>
-    <MicrosoftNETCorePlatformsPackageVersion>2.1.0-preview2-26314-06</MicrosoftNETCorePlatformsPackageVersion>
-    <MicrosoftNETCoreRuntimeCoreCLRPackageVersion>2.1.0-preview2-26314-17</MicrosoftNETCoreRuntimeCoreCLRPackageVersion>
+    <CoreFxExpectedPrerelease>preview3-26318-01</CoreFxExpectedPrerelease>
+    <MicrosoftNETCorePlatformsPackageVersion>2.1.0-preview3-26318-01</MicrosoftNETCorePlatformsPackageVersion>
+    <MicrosoftNETCoreRuntimeCoreCLRPackageVersion>2.1.0-preview2-26317-02</MicrosoftNETCoreRuntimeCoreCLRPackageVersion>
     <ProjectNTfsExpectedPrerelease>beta-26314-01</ProjectNTfsExpectedPrerelease>
-    <ProjectNTfsTestILCExpectedPrerelease>beta-26314-01</ProjectNTfsTestILCExpectedPrerelease>
-    <ProjectNTfsTestILCPackageVersion>1.0.0-beta-26314-01</ProjectNTfsTestILCPackageVersion>
-    <MicrosoftNETCoreDotNetHostPackageVersion>2.1.0-preview2-26314-02</MicrosoftNETCoreDotNetHostPackageVersion>
-    <MicrosoftNETCoreDotNetHostPolicyPackageVersion>2.1.0-preview2-26314-02</MicrosoftNETCoreDotNetHostPolicyPackageVersion>
-    <MicrosoftNETCoreAppPackageVersion>2.1.0-preview2-26314-02</MicrosoftNETCoreAppPackageVersion>
-    <MicrosoftDotNetPlatformAbstractionsPackageVersion>2.1.0-preview2-26314-02</MicrosoftDotNetPlatformAbstractionsPackageVersion>
+    <ProjectNTfsTestILCExpectedPrerelease>beta-26316-00</ProjectNTfsTestILCExpectedPrerelease>
+    <ProjectNTfsTestILCPackageVersion>1.0.0-beta-26316-00</ProjectNTfsTestILCPackageVersion>
+    <MicrosoftNETCoreDotNetHostPackageVersion>2.1.0-preview3-26317-03</MicrosoftNETCoreDotNetHostPackageVersion>
+    <MicrosoftNETCoreDotNetHostPolicyPackageVersion>2.1.0-preview3-26317-03</MicrosoftNETCoreDotNetHostPolicyPackageVersion>
+    <MicrosoftNETCoreAppPackageVersion>2.1.0-preview3-26317-03</MicrosoftNETCoreAppPackageVersion>
+    <MicrosoftDotNetPlatformAbstractionsPackageVersion>2.1.0-preview3-26317-03</MicrosoftDotNetPlatformAbstractionsPackageVersion>
 
     <!-- CoreFX-built SNI identity package -->
     <RuntimeNativeSystemDataSqlClientSniPackageVersion>4.4.0</RuntimeNativeSystemDataSqlClientSniPackageVersion>
@@ -48,13 +48,13 @@
     <AppXRunnerVersion>1.0.3-prerelease-00921-01</AppXRunnerVersion>
     <XunitPerfAnalysisPackageVersion>1.0.0-beta-build0018</XunitPerfAnalysisPackageVersion>
     <TraceEventPackageVersion>2.0.5</TraceEventPackageVersion>
-    <XunitNetcoreExtensionsVersion>2.1.0-preview2-02612-03</XunitNetcoreExtensionsVersion>
+    <XunitNetcoreExtensionsVersion>2.1.0-preview3-02616-02</XunitNetcoreExtensionsVersion>
   </PropertyGroup>
 
   <!-- Package versions used as toolsets -->
   <PropertyGroup>
     <FeedTasksPackage>Microsoft.DotNet.Build.Tasks.Feed</FeedTasksPackage>
-    <FeedTasksPackageVersion>2.1.0-preview2-02612-03</FeedTasksPackageVersion>
+    <FeedTasksPackageVersion>2.1.0-preview3-02616-02</FeedTasksPackageVersion>
   </PropertyGroup>
 
   <!-- Publish symbol build task package -->
diff --git a/external/test-runtime/optional.json b/external/test-runtime/optional.json
index 4dd5760d6ad1..c5ec7d8c8aa2 100644
--- a/external/test-runtime/optional.json
+++ b/external/test-runtime/optional.json
@@ -3,9 +3,9 @@
     "net45": {
       "dependencies": {
         "Microsoft.DotNet.IBCMerge": "4.6.0-alpha-00001",
-        "TestILC.amd64ret": "1.0.0-beta-26314-01",
-        "TestILC.armret": "1.0.0-beta-26314-01",
-        "TestILC.x86ret": "1.0.0-beta-26314-01"
+        "TestILC.amd64ret": "1.0.0-beta-26316-00",
+        "TestILC.armret": "1.0.0-beta-26316-00",
+        "TestILC.x86ret": "1.0.0-beta-26316-00"
       }
     }
   }
diff --git a/tools-local/ILAsmVersion.txt b/tools-local/ILAsmVersion.txt
index 203f2add2ad5..b6a4c4be014f 100644
--- a/tools-local/ILAsmVersion.txt
+++ b/tools-local/ILAsmVersion.txt
@@ -1 +1 @@
-2.1.0-preview2-26314-17
\ No newline at end of file
+2.1.0-preview2-26317-02
\ No newline at end of file