diff --git a/source/nanoFramework.System.Math.DELIVERABLES.nuspec b/source/nanoFramework.System.Math.DELIVERABLES.nuspec
index 4ae9408..aaa02a2 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="1.7.0-preview.12" />
+      <dependency id="nanoFramework.CoreLibrary" version="1.7.1-preview.4" />
     </dependencies>
   </metadata>
   <files>
diff --git a/source/nanoFramework.System.Math.nuspec b/source/nanoFramework.System.Math.nuspec
index 56a15ac..5caf61d 100644
--- a/source/nanoFramework.System.Math.nuspec
+++ b/source/nanoFramework.System.Math.nuspec
@@ -20,7 +20,7 @@ This package requires a target with nanoFramework.System.Math v$nativeVersion$.<
     <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="1.7.0-preview.12" />
+      <dependency id="nanoFramework.CoreLibrary" version="1.7.1-preview.4" />
     </dependencies>
   </metadata>
   <files>
diff --git a/source/nanoFramework.System.Math/nanoFramework.System.Math.nfproj b/source/nanoFramework.System.Math/nanoFramework.System.Math.nfproj
index d7f87d7..1add53e 100644
--- a/source/nanoFramework.System.Math/nanoFramework.System.Math.nfproj
+++ b/source/nanoFramework.System.Math/nanoFramework.System.Math.nfproj
@@ -39,7 +39,7 @@
     </NFMDP_PE_ExcludeClassByName>
   </ItemGroup>
   <ItemGroup>
-    <NFMDP_PE_LoadHints Include="..\packages\nanoFramework.CoreLibrary.1.7.0-preview.12\lib\mscorlib.dll">
+    <NFMDP_PE_LoadHints Include="..\packages\nanoFramework.CoreLibrary.1.7.1-preview.4\lib\mscorlib.dll">
       <InProject>false</InProject>
     </NFMDP_PE_LoadHints>
   </ItemGroup>
@@ -53,8 +53,8 @@
     <None Include="packages.config" />
   </ItemGroup>
   <ItemGroup>
-    <Reference Include="mscorlib, Version=1.7.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\packages\nanoFramework.CoreLibrary.1.7.0-preview.12\lib\mscorlib.dll</HintPath>
+    <Reference Include="mscorlib, Version=1.7.1.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
+      <HintPath>..\packages\nanoFramework.CoreLibrary.1.7.1-preview.4\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 c22f25b..5eca869 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="1.7.0-preview.12" targetFramework="netnanoframework10" />
+  <package id="nanoFramework.CoreLibrary" version="1.7.1-preview.4" targetFramework="netnanoframework10" />
   <package id="Nerdbank.GitVersioning" version="3.1.13-beta" developmentDependency="true" targetFramework="netnanoframework10" />
 </packages>
\ No newline at end of file