diff --git a/source/nanoFramework.System.Math.DELIVERABLES.nuspec b/source/nanoFramework.System.Math.DELIVERABLES.nuspec
index c27923f..197fcce 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="1.4.0-preview.3" />
+      <dependency id="nanoFramework.CoreLibrary" version="1.4.1-preview.1" />
     </dependencies>
   </metadata>
   <files>
diff --git a/source/nanoFramework.System.Math.nuspec b/source/nanoFramework.System.Math.nuspec
index dc2adf2..279298c 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="1.4.0-preview.3" />
+      <dependency id="nanoFramework.CoreLibrary" version="1.4.1-preview.1" />
     </dependencies>
   </metadata>
   <files>
diff --git a/source/nanoFramework.System.Math/nanoFramework.System.Math.nfproj b/source/nanoFramework.System.Math/nanoFramework.System.Math.nfproj
index 6c69f56..b158209 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.1.4.0-preview.3\lib\mscorlib.dll">
+    <NFMDP_PE_LoadHints Include="..\packages\nanoFramework.CoreLibrary.1.4.1-preview.1\lib\mscorlib.dll">
       <InProject>false</InProject>
     </NFMDP_PE_LoadHints>
   </ItemGroup>
@@ -64,8 +64,8 @@
     <None Include="packages.config" />
   </ItemGroup>
   <ItemGroup>
-    <Reference Include="mscorlib, Version=1.4.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\packages\nanoFramework.CoreLibrary.1.4.0-preview.3\lib\mscorlib.dll</HintPath>
+    <Reference Include="mscorlib, Version=1.4.1.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
+      <HintPath>..\packages\nanoFramework.CoreLibrary.1.4.1-preview.1\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 1b4f7fc..bc8c70f 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="1.4.0-preview.3" targetFramework="netnanoframework10" />
+  <package id="nanoFramework.CoreLibrary" version="1.4.1-preview.1" targetFramework="netnanoframework10" />
   <package id="Nerdbank.GitVersioning" version="3.1.13-beta" developmentDependency="true" targetFramework="netnanoframework10" />
 </packages>
\ No newline at end of file