diff --git a/System.IO.FileSystem/System.IO.FileSystem.nfproj b/System.IO.FileSystem/System.IO.FileSystem.nfproj
index f49a5e4..9d04203 100644
--- a/System.IO.FileSystem/System.IO.FileSystem.nfproj
+++ b/System.IO.FileSystem/System.IO.FileSystem.nfproj
@@ -38,7 +38,7 @@
     <Name>System.IO.FileSystem</Name>
   </PropertyGroup>
   <ItemGroup>
-    <NFMDP_PE_LoadHints Include="..\packages\nanoFramework.CoreLibrary.1.10.5-preview.4\lib\mscorlib.dll">
+    <NFMDP_PE_LoadHints Include="..\packages\nanoFramework.CoreLibrary.1.10.5-preview.10\lib\mscorlib.dll">
       <InProject>false</InProject>
     </NFMDP_PE_LoadHints>
   </ItemGroup>
@@ -65,7 +65,7 @@
   </ItemGroup>
   <ItemGroup>
     <Reference Include="mscorlib, Version=1.10.5.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\packages\nanoFramework.CoreLibrary.1.10.5-preview.4\lib\mscorlib.dll</HintPath>
+      <HintPath>..\packages\nanoFramework.CoreLibrary.1.10.5-preview.10\lib\mscorlib.dll</HintPath>
       <Private>True</Private>
     </Reference>
   </ItemGroup>
diff --git a/System.IO.FileSystem/packages.config b/System.IO.FileSystem/packages.config
index 85d8463..e0d1145 100644
--- a/System.IO.FileSystem/packages.config
+++ b/System.IO.FileSystem/packages.config
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="nanoFramework.CoreLibrary" version="1.10.5-preview.4" targetFramework="netnanoframework10" />
+  <package id="nanoFramework.CoreLibrary" version="1.10.5-preview.10" targetFramework="netnanoframework10" />
   <package id="Nerdbank.GitVersioning" version="3.3.37" developmentDependency="true" targetFramework="netnanoframework10" />
 </packages>
\ No newline at end of file
diff --git a/Tests/NFUnitTestMemoryStream/NFUnitTestMemoryStream.nfproj b/Tests/NFUnitTestMemoryStream/NFUnitTestMemoryStream.nfproj
index 8a41caf..a69c22a 100644
--- a/Tests/NFUnitTestMemoryStream/NFUnitTestMemoryStream.nfproj
+++ b/Tests/NFUnitTestMemoryStream/NFUnitTestMemoryStream.nfproj
@@ -32,7 +32,7 @@
   </ItemGroup>
   <ItemGroup>
     <Reference Include="mscorlib, Version=1.10.5.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\..\packages\nanoFramework.CoreLibrary.1.10.5-preview.4\lib\mscorlib.dll</HintPath>
+      <HintPath>..\..\packages\nanoFramework.CoreLibrary.1.10.5-preview.10\lib\mscorlib.dll</HintPath>
       <Private>True</Private>
     </Reference>
     <Reference Include="nanoFramework.TestFramework, Version=1.0.127.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
diff --git a/Tests/NFUnitTestMemoryStream/packages.config b/Tests/NFUnitTestMemoryStream/packages.config
index eb1016d..a79505d 100644
--- a/Tests/NFUnitTestMemoryStream/packages.config
+++ b/Tests/NFUnitTestMemoryStream/packages.config
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="nanoFramework.CoreLibrary" version="1.10.5-preview.4" targetFramework="netnanoframework10" />
+  <package id="nanoFramework.CoreLibrary" version="1.10.5-preview.10" targetFramework="netnanoframework10" />
   <package id="nanoFramework.TestFramework" version="1.0.127" targetFramework="netnanoframework10" developmentDependency="true" />
 </packages>
\ No newline at end of file
diff --git a/nanoFramework.System.IO.FileSystem.nuspec b/nanoFramework.System.IO.FileSystem.nuspec
index 1f3081d..e9a2575 100644
--- a/nanoFramework.System.IO.FileSystem.nuspec
+++ b/nanoFramework.System.IO.FileSystem.nuspec
@@ -19,7 +19,7 @@
 This package requires a target with System.IO.FileSystem v$nativeVersion$ (checksum $checksum$).</description>
     <tags>nanoFramework C# csharp netmf netnf System.IO.FileSystem</tags>
     <dependencies>
-      <dependency id="nanoFramework.CoreLibrary" version="1.10.5-preview.4" />
+      <dependency id="nanoFramework.CoreLibrary" version="1.10.5-preview.10" />
     </dependencies>
   </metadata>
   <files>