diff --git a/Tests/MathUnitTests/MathUnitTests.nfproj b/Tests/MathUnitTests/MathUnitTests.nfproj
index 3d78230..3e5e825 100644
--- a/Tests/MathUnitTests/MathUnitTests.nfproj
+++ b/Tests/MathUnitTests/MathUnitTests.nfproj
@@ -35,8 +35,8 @@
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-    <Reference Include="mscorlib">
-      <HintPath>..\..\packages\nanoFramework.CoreLibrary.2.0.0-preview.29\lib\netnano1.0\mscorlib.dll</HintPath>
+    <Reference Include="mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
+      <HintPath>..\..\packages\nanoFramework.CoreLibrary.2.0.0-preview.30\lib\netnano1.0\mscorlib.dll</HintPath>
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diff --git a/Tests/MathUnitTests/packages.config b/Tests/MathUnitTests/packages.config
index 43ab952..1f1664e 100644
--- a/Tests/MathUnitTests/packages.config
+++ b/Tests/MathUnitTests/packages.config
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="nanoFramework.CoreLibrary" version="2.0.0-preview.29" targetFramework="netnano1.0" />
+  <package id="nanoFramework.CoreLibrary" version="2.0.0-preview.30" targetFramework="netnano1.0" />
   <package id="nanoFramework.TestFramework" version="4.0.0-preview.45" targetFramework="netnano1.0" developmentDependency="true" />
 </packages>
\ No newline at end of file
diff --git a/Tests/MathUnitTests/packages.lock.json b/Tests/MathUnitTests/packages.lock.json
index 1fe5e62..244e70c 100644
--- a/Tests/MathUnitTests/packages.lock.json
+++ b/Tests/MathUnitTests/packages.lock.json
@@ -4,9 +4,9 @@
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+        "requested": "[2.0.0-preview.30, 2.0.0-preview.30]",
+        "resolved": "2.0.0-preview.30",
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diff --git a/nanoFramework.System.Math.Benchmark/nanoFramework.System.Math.Benchmark.nfproj b/nanoFramework.System.Math.Benchmark/nanoFramework.System.Math.Benchmark.nfproj
index f04d4c8..40cc81c 100644
--- a/nanoFramework.System.Math.Benchmark/nanoFramework.System.Math.Benchmark.nfproj
+++ b/nanoFramework.System.Math.Benchmark/nanoFramework.System.Math.Benchmark.nfproj
@@ -32,8 +32,8 @@
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-    <Reference Include="mscorlib">
-      <HintPath>..\packages\nanoFramework.CoreLibrary.2.0.0-preview.29\lib\netnano1.0\mscorlib.dll</HintPath>
+    <Reference Include="mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
+      <HintPath>..\packages\nanoFramework.CoreLibrary.2.0.0-preview.30\lib\netnano1.0\mscorlib.dll</HintPath>
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@@ -47,8 +47,8 @@
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-      <HintPath>..\packages\nanoFramework.System.Text.1.3.42\lib\nanoFramework.System.Text.dll</HintPath>
+    <Reference Include="nanoFramework.System.Text, Version=2.0.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
+      <HintPath>..\packages\nanoFramework.System.Text.2.0.0-preview.1\lib\nanoFramework.System.Text.dll</HintPath>
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     <Reference Include="System.Diagnostics.Stopwatch, Version=1.2.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
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diff --git a/nanoFramework.System.Math.Benchmark/packages.config b/nanoFramework.System.Math.Benchmark/packages.config
index 0de243d..bea2169 100644
--- a/nanoFramework.System.Math.Benchmark/packages.config
+++ b/nanoFramework.System.Math.Benchmark/packages.config
@@ -1,10 +1,10 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
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-  <package id="nanoFramework.CoreLibrary" version="2.0.0-preview.29" targetFramework="netnano1.0" />
+  <package id="nanoFramework.CoreLibrary" version="2.0.0-preview.30" targetFramework="netnano1.0" />
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-  <package id="nanoFramework.System.Text" version="1.3.42" targetFramework="netnano1.0" />
+  <package id="nanoFramework.System.Text" version="2.0.0-preview.1" targetFramework="netnano1.0" />
 </packages>
\ No newline at end of file
diff --git a/nanoFramework.System.Math.Benchmark/packages.lock.json b/nanoFramework.System.Math.Benchmark/packages.lock.json
index 75b99c1..c44ad3d 100644
--- a/nanoFramework.System.Math.Benchmark/packages.lock.json
+++ b/nanoFramework.System.Math.Benchmark/packages.lock.json
@@ -10,9 +10,9 @@
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+        "requested": "[2.0.0-preview.30, 2.0.0-preview.30]",
+        "resolved": "2.0.0-preview.30",
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@@ -40,9 +40,9 @@
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+        "requested": "[2.0.0-preview.1, 2.0.0-preview.1]",
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diff --git a/nanoFramework.System.Math.nuspec b/nanoFramework.System.Math.nuspec
index 6337674..04b243f 100644
--- a/nanoFramework.System.Math.nuspec
+++ b/nanoFramework.System.Math.nuspec
@@ -1,4 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
 <package xmlns="http://schemas.microsoft.com/packaging/2012/06/nuspec.xsd">
   <metadata>
     <id>nanoFramework.System.Math</id>
@@ -19,7 +19,7 @@
 This package requires a target with System.Math v$nativeVersion$ (checksum $checksum$).</description>
     <tags>nanoFramework C# csharp netmf netnf Math</tags>
     <dependencies>
-      <dependency id="nanoFramework.CoreLibrary" version="2.0.0-preview.29" />
+      <dependency id="nanoFramework.CoreLibrary" version="2.0.0-preview.30" />
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   <files>
@@ -33,4 +33,4 @@ This package requires a target with System.Math v$nativeVersion$ (checksum $chec
     <file src="assets\nf-logo.png" target="images" />
     <file src="LICENSE.md" target="" />
   </files>
-</package>
+</package>
\ No newline at end of file
diff --git a/nanoFramework.System.Math/nanoFramework.System.Math.nfproj b/nanoFramework.System.Math/nanoFramework.System.Math.nfproj
index 7e35e1c..3dbd18d 100644
--- a/nanoFramework.System.Math/nanoFramework.System.Math.nfproj
+++ b/nanoFramework.System.Math/nanoFramework.System.Math.nfproj
@@ -54,8 +54,8 @@
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-      <HintPath>..\packages\nanoFramework.CoreLibrary.2.0.0-preview.29\lib\netnano1.0\mscorlib.dll</HintPath>
+    <Reference Include="mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
+      <HintPath>..\packages\nanoFramework.CoreLibrary.2.0.0-preview.30\lib\netnano1.0\mscorlib.dll</HintPath>
     </Reference>
   </ItemGroup>
   <Import Project="$(NanoFrameworkProjectSystemPath)NFProjectSystem.CSharp.targets" Condition="Exists('$(NanoFrameworkProjectSystemPath)NFProjectSystem.CSharp.targets')" />
diff --git a/nanoFramework.System.Math/packages.config b/nanoFramework.System.Math/packages.config
index 99e498c..b07d6d6 100644
--- a/nanoFramework.System.Math/packages.config
+++ b/nanoFramework.System.Math/packages.config
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="nanoFramework.CoreLibrary" version="2.0.0-preview.29" targetFramework="netnano1.0" />
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\ No newline at end of file
diff --git a/nanoFramework.System.Math/packages.lock.json b/nanoFramework.System.Math/packages.lock.json
index 0e819fb..85dabf3 100644
--- a/nanoFramework.System.Math/packages.lock.json
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@@ -4,9 +4,9 @@
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