diff --git a/BuildToolsVersion.txt b/BuildToolsVersion.txt
index c754229440a1..7787a55393cc 100644
--- a/BuildToolsVersion.txt
+++ b/BuildToolsVersion.txt
@@ -1 +1 @@
-2.1.0-preview3-02616-02
+2.1.0-preview3-02620-10
diff --git a/ILAsmVersion.txt b/ILAsmVersion.txt
index 09dc05b92612..0de52e8335d1 100644
--- a/ILAsmVersion.txt
+++ b/ILAsmVersion.txt
@@ -1 +1 @@
-2.1.0-preview2-26316-09
+2.1.0-preview3-26321-06
diff --git a/dependencies.props b/dependencies.props
index ef582763278b..af169eb65fc4 100644
--- a/dependencies.props
+++ b/dependencies.props
@@ -23,18 +23,18 @@
 
   <!-- Source of truth for dependency tooling: the commit hash of the dotnet/versions master branch as of the last auto-upgrade. -->
   <PropertyGroup>
-    <CoreFxCurrentRef>ab89b3c8dcb6e7b40d1afdb363abb543f05aaf6e</CoreFxCurrentRef>
-    <CoreClrCurrentRef>ab89b3c8dcb6e7b40d1afdb363abb543f05aaf6e</CoreClrCurrentRef>
-    <BuildToolsCurrentRef>ab89b3c8dcb6e7b40d1afdb363abb543f05aaf6e</BuildToolsCurrentRef>
+    <CoreFxCurrentRef>1528e3f1252194b0b3274c34882887dc014257c2</CoreFxCurrentRef>
+    <CoreClrCurrentRef>1528e3f1252194b0b3274c34882887dc014257c2</CoreClrCurrentRef>
+    <BuildToolsCurrentRef>1528e3f1252194b0b3274c34882887dc014257c2</BuildToolsCurrentRef>
     <PgoDataCurrentRef>553f30357d08df4ed6d32f70f3478a76f5db79c2</PgoDataCurrentRef>
   </PropertyGroup>
 
   <!-- Tests/infrastructure dependency versions. -->
   <PropertyGroup>
-    <MicrosoftPrivateCoreFxNETCoreAppPackageVersion>4.5.0-preview2-26317-01</MicrosoftPrivateCoreFxNETCoreAppPackageVersion>
-    <MicrosoftNETCorePlatformsPackageVersion>2.1.0-preview2-26317-01</MicrosoftNETCorePlatformsPackageVersion>
+    <MicrosoftPrivateCoreFxNETCoreAppPackageVersion>4.5.0-preview3-26319-04</MicrosoftPrivateCoreFxNETCoreAppPackageVersion>
+    <MicrosoftNETCorePlatformsPackageVersion>2.1.0-preview3-26319-04</MicrosoftNETCorePlatformsPackageVersion>
     <PgoDataPackageVersion>99.99.99-master-20180228-0037</PgoDataPackageVersion>
-    <MicrosoftNETCoreRuntimeCoreCLRPackageVersion>2.1.0-preview2-26316-09</MicrosoftNETCoreRuntimeCoreCLRPackageVersion>
+    <MicrosoftNETCoreRuntimeCoreCLRPackageVersion>2.1.0-preview3-26321-06</MicrosoftNETCoreRuntimeCoreCLRPackageVersion>
     <XunitPackageVersion>2.2.0-beta2-build3300</XunitPackageVersion>
     <XunitConsoleNetcorePackageVersion>1.0.2-prerelease-00177</XunitConsoleNetcorePackageVersion>
     <XunitPerformanceApiPackageVersion>1.0.0-beta-build0015</XunitPerformanceApiPackageVersion>
@@ -51,7 +51,7 @@
   <!-- Package versions used as toolsets -->
   <PropertyGroup>
     <FeedTasksPackage>Microsoft.DotNet.Build.Tasks.Feed</FeedTasksPackage>
-    <FeedTasksPackageVersion>2.1.0-preview3-02616-02</FeedTasksPackageVersion>
+    <FeedTasksPackageVersion>2.1.0-preview3-02620-10</FeedTasksPackageVersion>
   </PropertyGroup>
 
   <!-- Package dependency verification/auto-upgrade configuration. -->