diff --git a/samples/Directory.Build.props b/samples/Directory.Build.props
index ae854cf01..b03e54a08 100644
--- a/samples/Directory.Build.props
+++ b/samples/Directory.Build.props
@@ -1,8 +1,8 @@
 <Project>
 
   <PropertyGroup>
-    <MicrosoftMLVersion>1.5.0</MicrosoftMLVersion>
-    <MicrosoftMLPreviewVersion>0.17.0</MicrosoftMLPreviewVersion>
+    <MicrosoftMLVersion>1.5.3</MicrosoftMLVersion>
+    <MicrosoftMLPreviewVersion>0.17.3</MicrosoftMLPreviewVersion>
   </PropertyGroup>
 
 </Project>
diff --git a/samples/csharp/end-to-end-apps/DeepLearning_ImageClassification_TF/TFImageClassification/TFImageClassification.csproj b/samples/csharp/end-to-end-apps/DeepLearning_ImageClassification_TF/TFImageClassification/TFImageClassification.csproj
index f50ebe766..92a1fe5b1 100644
--- a/samples/csharp/end-to-end-apps/DeepLearning_ImageClassification_TF/TFImageClassification/TFImageClassification.csproj
+++ b/samples/csharp/end-to-end-apps/DeepLearning_ImageClassification_TF/TFImageClassification/TFImageClassification.csproj
@@ -11,7 +11,8 @@
     <PackageReference Include="Microsoft.ML" Version="$(MicrosoftMLVersion)" />
     <PackageReference Include="Microsoft.ML.ImageAnalytics" Version="$(MicrosoftMLVersion)" />
     <PackageReference Include="Microsoft.ML.TensorFlow" Version="$(MicrosoftMLVersion)" />
-    <PackageReference Include="SciSharp.TensorFlow.Redist" Version="2.3.0" />
+    <PackageReference Include="SciSharp.TensorFlow.Redist" Version="2.3.1" />
+    <PackageReference Condition="'$(TargetFramework)'=='netcoreapp2.1'" Include="System.Runtime.CompilerServices.Unsafe" Version="4.5.3" />
   </ItemGroup>
 
   <ItemGroup>
diff --git a/samples/csharp/getting-started/DeepLearning_ImageClassification_Binary/DeepLearning_ImageClassification/DeepLearning_ImageClassification.csproj b/samples/csharp/getting-started/DeepLearning_ImageClassification_Binary/DeepLearning_ImageClassification/DeepLearning_ImageClassification.csproj
index 773af2401..611e2abc7 100644
--- a/samples/csharp/getting-started/DeepLearning_ImageClassification_Binary/DeepLearning_ImageClassification/DeepLearning_ImageClassification.csproj
+++ b/samples/csharp/getting-started/DeepLearning_ImageClassification_Binary/DeepLearning_ImageClassification/DeepLearning_ImageClassification.csproj
@@ -9,8 +9,8 @@
     <PackageReference Include="Microsoft.ML" Version="$(MicrosoftMLVersion)" />
     <PackageReference Include="Microsoft.ML.ImageAnalytics" Version="$(MicrosoftMLVersion)" />
     <PackageReference Include="Microsoft.ML.Vision" Version="$(MicrosoftMLVersion)" />
-    <PackageReference Include="SciSharp.TensorFlow.Redist" Version="2.3.0" />
-    <PackageReference Condition="'$(TargetFramework)'=='netcoreapp2.1'" Include="System.Runtime.CompilerServices.Unsafe" Version="5.0.0" />
+    <PackageReference Include="SciSharp.TensorFlow.Redist" Version="2.3.1" />
+    <PackageReference Condition="'$(TargetFramework)'=='netcoreapp2.1'" Include="System.Runtime.CompilerServices.Unsafe" Version="4.5.3" />
   </ItemGroup>
 
   <ItemGroup>
diff --git a/samples/csharp/getting-started/DeepLearning_ImageClassification_TensorFlow/ImageClassification/ImageClassification.Score.csproj b/samples/csharp/getting-started/DeepLearning_ImageClassification_TensorFlow/ImageClassification/ImageClassification.Score.csproj
index 2fba36928..fc2a408b9 100644
--- a/samples/csharp/getting-started/DeepLearning_ImageClassification_TensorFlow/ImageClassification/ImageClassification.Score.csproj
+++ b/samples/csharp/getting-started/DeepLearning_ImageClassification_TensorFlow/ImageClassification/ImageClassification.Score.csproj
@@ -14,7 +14,8 @@
     <PackageReference Include="Microsoft.ML" Version="$(MicrosoftMLVersion)" />
     <PackageReference Include="Microsoft.ML.ImageAnalytics" Version="$(MicrosoftMLVersion)" />
     <PackageReference Include="Microsoft.ML.TensorFlow" Version="$(MicrosoftMLVersion)" />
-    <PackageReference Include="SciSharp.TensorFlow.Redist" Version="1.15.0" />
+    <PackageReference Include="SciSharp.TensorFlow.Redist" Version="2.3.1" />
+    <PackageReference Condition="'$(TargetFramework)'=='netcoreapp2.1'" Include="System.Runtime.CompilerServices.Unsafe" Version="4.5.3" />
   </ItemGroup>
 
 </Project>
diff --git a/samples/csharp/getting-started/DeepLearning_ImageClassification_Training/ImageClassification.Predict/ImageClassification.Predict.csproj b/samples/csharp/getting-started/DeepLearning_ImageClassification_Training/ImageClassification.Predict/ImageClassification.Predict.csproj
index deaf89f32..6f620c860 100644
--- a/samples/csharp/getting-started/DeepLearning_ImageClassification_Training/ImageClassification.Predict/ImageClassification.Predict.csproj
+++ b/samples/csharp/getting-started/DeepLearning_ImageClassification_Training/ImageClassification.Predict/ImageClassification.Predict.csproj
@@ -16,7 +16,8 @@
     <PackageReference Include="Microsoft.ML" Version="$(MicrosoftMLVersion)" />
     <PackageReference Include="Microsoft.ML.ImageAnalytics" Version="$(MicrosoftMLVersion)" />
     <PackageReference Include="Microsoft.ML.Vision" Version="$(MicrosoftMLVersion)" />
-    <PackageReference Include="SciSharp.TensorFlow.Redist" Version="2.3.0" />
+    <PackageReference Include="SciSharp.TensorFlow.Redist" Version="2.3.1" />
+    <PackageReference Condition="'$(TargetFramework)'=='netcoreapp2.1'" Include="System.Runtime.CompilerServices.Unsafe" Version="4.5.3" />
   </ItemGroup>
 
   <ItemGroup>
diff --git a/samples/csharp/getting-started/DeepLearning_ImageClassification_Training/ImageClassification.Train/ImageClassification.Train.csproj b/samples/csharp/getting-started/DeepLearning_ImageClassification_Training/ImageClassification.Train/ImageClassification.Train.csproj
index 99f02e069..d60650693 100644
--- a/samples/csharp/getting-started/DeepLearning_ImageClassification_Training/ImageClassification.Train/ImageClassification.Train.csproj
+++ b/samples/csharp/getting-started/DeepLearning_ImageClassification_Training/ImageClassification.Train/ImageClassification.Train.csproj
@@ -15,7 +15,8 @@
     <PackageReference Include="Microsoft.ML" Version="$(MicrosoftMLVersion)" />
     <PackageReference Include="Microsoft.ML.ImageAnalytics" Version="$(MicrosoftMLVersion)" />
     <PackageReference Include="Microsoft.ML.Vision" Version="$(MicrosoftMLVersion)" />
-    <PackageReference Include="SciSharp.TensorFlow.Redist" Version="2.3.0" />
+    <PackageReference Include="SciSharp.TensorFlow.Redist" Version="2.3.1" />
+    <PackageReference Condition="'$(TargetFramework)'=='netcoreapp2.1'" Include="System.Runtime.CompilerServices.Unsafe" Version="4.5.3" />
     <PackageReference Include="SharpZipLib" Version="1.2.0" />
   </ItemGroup>
 
diff --git a/samples/csharp/getting-started/DeepLearning_ImageClassification_Training/WebApp.Predict/ImageClassification.WebApp.csproj b/samples/csharp/getting-started/DeepLearning_ImageClassification_Training/WebApp.Predict/ImageClassification.WebApp.csproj
index ab6e7e484..79695aa75 100644
--- a/samples/csharp/getting-started/DeepLearning_ImageClassification_Training/WebApp.Predict/ImageClassification.WebApp.csproj
+++ b/samples/csharp/getting-started/DeepLearning_ImageClassification_Training/WebApp.Predict/ImageClassification.WebApp.csproj
@@ -10,7 +10,8 @@
     <PackageReference Include="Microsoft.ML" Version="$(MicrosoftMLVersion)" />
     <PackageReference Include="Microsoft.ML.ImageAnalytics" Version="$(MicrosoftMLVersion)" />
     <PackageReference Include="Microsoft.ML.Vision" Version="$(MicrosoftMLVersion)" />
-    <PackageReference Include="SciSharp.TensorFlow.Redist" Version="1.15.0" />
+    <PackageReference Include="SciSharp.TensorFlow.Redist" Version="2.3.1" />
+    <PackageReference Condition="'$(TargetFramework)'=='netcoreapp2.1'" Include="System.Runtime.CompilerServices.Unsafe" Version="4.5.3" />
     <PackageReference Include="Microsoft.Extensions.ML" Version="$(MicrosoftMLVersion)" /> 
   </ItemGroup>
 
diff --git a/samples/csharp/getting-started/DeepLearning_TensorFlowEstimator/ImageClassification.Predict/ImageClassification.Predict.csproj b/samples/csharp/getting-started/DeepLearning_TensorFlowEstimator/ImageClassification.Predict/ImageClassification.Predict.csproj
index 5dd611ac4..6e985b208 100644
--- a/samples/csharp/getting-started/DeepLearning_TensorFlowEstimator/ImageClassification.Predict/ImageClassification.Predict.csproj
+++ b/samples/csharp/getting-started/DeepLearning_TensorFlowEstimator/ImageClassification.Predict/ImageClassification.Predict.csproj
@@ -22,7 +22,8 @@
     <PackageReference Include="Microsoft.ML" Version="$(MicrosoftMLVersion)" />
     <PackageReference Include="Microsoft.ML.ImageAnalytics" Version="$(MicrosoftMLVersion)" />
     <PackageReference Include="Microsoft.ML.TensorFlow" Version="$(MicrosoftMLVersion)" />
-    <PackageReference Include="SciSharp.TensorFlow.Redist" Version="1.15.0" />
+    <PackageReference Include="SciSharp.TensorFlow.Redist" Version="2.3.1" />
+    <PackageReference Condition="'$(TargetFramework)'=='netcoreapp2.1'" Include="System.Runtime.CompilerServices.Unsafe" Version="4.5.3" />
   </ItemGroup>
 
 </Project>
diff --git a/samples/csharp/getting-started/DeepLearning_TensorFlowEstimator/ImageClassification.Train/ImageClassification.Train.csproj b/samples/csharp/getting-started/DeepLearning_TensorFlowEstimator/ImageClassification.Train/ImageClassification.Train.csproj
index a117dfab4..03f0b573f 100644
--- a/samples/csharp/getting-started/DeepLearning_TensorFlowEstimator/ImageClassification.Train/ImageClassification.Train.csproj
+++ b/samples/csharp/getting-started/DeepLearning_TensorFlowEstimator/ImageClassification.Train/ImageClassification.Train.csproj
@@ -17,7 +17,8 @@
     <PackageReference Include="Microsoft.ML" Version="$(MicrosoftMLVersion)" />
     <PackageReference Include="Microsoft.ML.ImageAnalytics" Version="$(MicrosoftMLVersion)" />
     <PackageReference Include="Microsoft.ML.TensorFlow" Version="$(MicrosoftMLVersion)" />
-    <PackageReference Include="SciSharp.TensorFlow.Redist" Version="1.15.0" />
+    <PackageReference Include="SciSharp.TensorFlow.Redist" Version="2.3.1" />
+    <PackageReference Condition="'$(TargetFramework)'=='netcoreapp2.1'" Include="System.Runtime.CompilerServices.Unsafe" Version="4.5.3" />
     <PackageReference Include="SharpZipLib" Version="1.2.0" />
   </ItemGroup>
 
diff --git a/samples/fsharp/getting-started/DeepLearning_ImageClassification_TensorFlow/ImageClassification/ImageClassification.Score.fsproj b/samples/fsharp/getting-started/DeepLearning_ImageClassification_TensorFlow/ImageClassification/ImageClassification.Score.fsproj
index 0fb534e31..9a6d38f47 100644
--- a/samples/fsharp/getting-started/DeepLearning_ImageClassification_TensorFlow/ImageClassification/ImageClassification.Score.fsproj
+++ b/samples/fsharp/getting-started/DeepLearning_ImageClassification_TensorFlow/ImageClassification/ImageClassification.Score.fsproj
@@ -13,7 +13,9 @@
     <PackageReference Include="Microsoft.ML" Version="$(MicrosoftMLVersion)" />
     <PackageReference Include="Microsoft.ML.ImageAnalytics" Version="$(MicrosoftMLVersion)" />
     <PackageReference Include="Microsoft.ML.TensorFlow" Version="$(MicrosoftMLVersion)" />
-    <PackageReference Include="SciSharp.TensorFlow.Redist" Version="2.3.0" />
+    <PackageReference Include="SciSharp.TensorFlow.Redist" Version="2.3.1" />
+    <PackageReference Condition="'$(TargetFramework)'=='netcoreapp2.1'" Include="System.Runtime.CompilerServices.Unsafe" Version="4.5.3" />
+    <PackageReference Include="System.Runtime.CompilerServices.Unsafe" Version="4.5.3" />
   </ItemGroup>
 
 </Project>
diff --git a/samples/fsharp/getting-started/DeepLearning_ImageClassification_Training/ImageClassification.Train/ImageClassification.Train.fsproj b/samples/fsharp/getting-started/DeepLearning_ImageClassification_Training/ImageClassification.Train/ImageClassification.Train.fsproj
index f139c27ed..13a535c8a 100644
--- a/samples/fsharp/getting-started/DeepLearning_ImageClassification_Training/ImageClassification.Train/ImageClassification.Train.fsproj
+++ b/samples/fsharp/getting-started/DeepLearning_ImageClassification_Training/ImageClassification.Train/ImageClassification.Train.fsproj
@@ -13,6 +13,7 @@
     <PackageReference Include="Microsoft.ML" Version="$(MicrosoftMLVersion)" />
     <PackageReference Include="Microsoft.ML.ImageAnalytics" Version="$(MicrosoftMLVersion)" />
     <PackageReference Include="Microsoft.ML.Vision" Version="$(MicrosoftMLVersion)" />
-    <PackageReference Include="SciSharp.TensorFlow.Redist" Version="1.15.0" />
+    <PackageReference Include="SciSharp.TensorFlow.Redist" Version="2.3.1" />
+    <PackageReference Condition="'$(TargetFramework)'=='netcoreapp2.1'" Include="System.Runtime.CompilerServices.Unsafe" Version="4.5.3" />
   </ItemGroup>
 </Project>
diff --git a/samples/fsharp/getting-started/DeepLearning_TensorFlowEstimator/ImageClassification.Predict/ImageClassification.Predict.fsproj b/samples/fsharp/getting-started/DeepLearning_TensorFlowEstimator/ImageClassification.Predict/ImageClassification.Predict.fsproj
index 3e4c4e563..a1d1919a7 100644
--- a/samples/fsharp/getting-started/DeepLearning_TensorFlowEstimator/ImageClassification.Predict/ImageClassification.Predict.fsproj
+++ b/samples/fsharp/getting-started/DeepLearning_TensorFlowEstimator/ImageClassification.Predict/ImageClassification.Predict.fsproj
@@ -13,7 +13,8 @@
     <PackageReference Include="Microsoft.ML" Version="$(MicrosoftMLVersion)" />
     <PackageReference Include="Microsoft.ML.ImageAnalytics" Version="$(MicrosoftMLVersion)" />
     <PackageReference Include="Microsoft.ML.TensorFlow" Version="$(MicrosoftMLVersion)" />
-    <PackageReference Include="SciSharp.TensorFlow.Redist" Version="2.3.0" />
+    <PackageReference Include="SciSharp.TensorFlow.Redist" Version="2.3.1" />
+    <PackageReference Condition="'$(TargetFramework)'=='netcoreapp2.1'" Include="System.Runtime.CompilerServices.Unsafe" Version="4.5.3" />
   </ItemGroup>
 
 </Project>
diff --git a/samples/fsharp/getting-started/DeepLearning_TensorFlowEstimator/ImageClassification.Train/ImageClassification.Train.fsproj b/samples/fsharp/getting-started/DeepLearning_TensorFlowEstimator/ImageClassification.Train/ImageClassification.Train.fsproj
index 3e4c4e563..a1d1919a7 100644
--- a/samples/fsharp/getting-started/DeepLearning_TensorFlowEstimator/ImageClassification.Train/ImageClassification.Train.fsproj
+++ b/samples/fsharp/getting-started/DeepLearning_TensorFlowEstimator/ImageClassification.Train/ImageClassification.Train.fsproj
@@ -13,7 +13,8 @@
     <PackageReference Include="Microsoft.ML" Version="$(MicrosoftMLVersion)" />
     <PackageReference Include="Microsoft.ML.ImageAnalytics" Version="$(MicrosoftMLVersion)" />
     <PackageReference Include="Microsoft.ML.TensorFlow" Version="$(MicrosoftMLVersion)" />
-    <PackageReference Include="SciSharp.TensorFlow.Redist" Version="2.3.0" />
+    <PackageReference Include="SciSharp.TensorFlow.Redist" Version="2.3.1" />
+    <PackageReference Condition="'$(TargetFramework)'=='netcoreapp2.1'" Include="System.Runtime.CompilerServices.Unsafe" Version="4.5.3" />
   </ItemGroup>
 
 </Project>