diff --git a/source/nanoFramework.System.Math.DELIVERABLES.nuspec b/source/nanoFramework.System.Math.DELIVERABLES.nuspec
index d1684a3..61767d9 100644
--- a/source/nanoFramework.System.Math.DELIVERABLES.nuspec
+++ b/source/nanoFramework.System.Math.DELIVERABLES.nuspec
@@ -18,7 +18,7 @@
     <tags>
     </tags>
     <dependencies>
-      <dependency id="nanoFramework.CoreLibrary" version="[1.2.6-preview.1]" />
+      <dependency id="nanoFramework.CoreLibrary" version="[1.2.6-preview.7]" />
     </dependencies>
   </metadata>
   <files>
diff --git a/source/nanoFramework.System.Math.nuspec b/source/nanoFramework.System.Math.nuspec
index cde812d..e061185 100644
--- a/source/nanoFramework.System.Math.nuspec
+++ b/source/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>
@@ -8,17 +8,19 @@
     <owners>nanoFramework project contributors</owners>
     <requireLicenseAcceptance>false</requireLicenseAcceptance>
     <license type="expression">Apache-2.0</license>
-    <releaseNotes></releaseNotes>
+    <releaseNotes>
+    </releaseNotes>
     <developmentDependency>false</developmentDependency>
     <projectUrl>https://github.com/nanoframework/lib-nanoFramework.System.Math</projectUrl>
     <iconUrl>https://secure.gravatar.com/avatar/97d0e092247f0716db6d4b47b7d1d1ad</iconUrl>
     <repository type="git" url="https://github.com/nanoframework/lib-nanoFramework.System.Math" commit="$commit$" />
     <copyright>Copyright (c) 2018 The nanoFramework project contributors</copyright>
-    <description>This package includes the nanoFramework.System.Math assembly for nanoFramework C# projects.&#10;This package requires a target with nanoFramework.System.Math v$nativeVersion$.</description>
+    <description>This package includes the nanoFramework.System.Math assembly for nanoFramework C# projects.
+This package requires a target with nanoFramework.System.Math v$nativeVersion$.</description>
     <summary>nanoFramework.System.Math assembly for nanoFramework C# projects</summary>
     <tags>nanoFramework C# csharp netmf netnf nanoFramework.System.Math</tags>
     <dependencies>
-      <dependency id="nanoFramework.CoreLibrary" version="1.2.6-preview.1" />
+      <dependency id="nanoFramework.CoreLibrary" version="1.2.6-preview.7" />
     </dependencies>
   </metadata>
   <files>
@@ -27,8 +29,7 @@
     <file src="nanoFramework.System.Math\bin\Release\System.Math.pdbx" target="lib\System.Math.pdbx" />
     <file src="nanoFramework.System.Math\bin\Release\System.Math.pe" target="lib\System.Math.pe" />
     <file src="nanoFramework.System.Math\bin\Release\System.Math.xml" target="lib\System.Math.xml" />
-
     <!-- readme -->
     <file src="readme.txt" target="readme.txt" />
   </files>
-</package>
\ No newline at end of file
+</package>
diff --git a/source/nanoFramework.System.Math/nanoFramework.System.Math.nfproj b/source/nanoFramework.System.Math/nanoFramework.System.Math.nfproj
index b165819..d8b8742 100644
--- a/source/nanoFramework.System.Math/nanoFramework.System.Math.nfproj
+++ b/source/nanoFramework.System.Math/nanoFramework.System.Math.nfproj
@@ -50,7 +50,7 @@
     </NFMDP_PE_ExcludeClassByName>
   </ItemGroup>
   <ItemGroup>
-    <NFMDP_PE_LoadHints Include="..\packages\nanoFramework.CoreLibrary.1.2.6-preview.1\lib\mscorlib.dll">
+    <NFMDP_PE_LoadHints Include="..\packages\nanoFramework.CoreLibrary.1.2.6-preview.7\lib\mscorlib.dll">
       <InProject>false</InProject>
     </NFMDP_PE_LoadHints>
   </ItemGroup>
@@ -65,7 +65,7 @@
   </ItemGroup>
   <ItemGroup>
     <Reference Include="mscorlib, Version=1.2.6.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\packages\nanoFramework.CoreLibrary.1.2.6-preview.1\lib\mscorlib.dll</HintPath>
+      <HintPath>..\packages\nanoFramework.CoreLibrary.1.2.6-preview.7\lib\mscorlib.dll</HintPath>
       <Private>True</Private>
     </Reference>
   </ItemGroup>
diff --git a/source/nanoFramework.System.Math/packages.config b/source/nanoFramework.System.Math/packages.config
index 48678bd..909d9ec 100644
--- a/source/nanoFramework.System.Math/packages.config
+++ b/source/nanoFramework.System.Math/packages.config
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="nanoFramework.CoreLibrary" version="1.2.6-preview.1" targetFramework="netnanoframework10" />
+  <package id="nanoFramework.CoreLibrary" version="1.2.6-preview.7" targetFramework="netnanoframework10" />
   <package id="Nerdbank.GitVersioning" version="3.0.19-beta" developmentDependency="true" targetFramework="netnanoframework10" />
 </packages>
\ No newline at end of file