diff --git a/System.IO.Hashing/System.IO.Hashing.nfproj b/System.IO.Hashing/System.IO.Hashing.nfproj
index b23e830..91c4274 100644
--- a/System.IO.Hashing/System.IO.Hashing.nfproj
+++ b/System.IO.Hashing/System.IO.Hashing.nfproj
@@ -55,7 +55,7 @@
   </ItemGroup>
   <ItemGroup>
     <Reference Include="mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\packages\nanoFramework.CoreLibrary.2.0.0-preview.35\lib\netnano1.0\mscorlib.dll</HintPath>
+      <HintPath>..\packages\nanoFramework.CoreLibrary.2.0.0-preview.39\lib\netnano1.0\mscorlib.dll</HintPath>
     </Reference>
   </ItemGroup>
   <Import Project="$(NanoFrameworkProjectSystemPath)NFProjectSystem.CSharp.targets" Condition="Exists('$(NanoFrameworkProjectSystemPath)NFProjectSystem.CSharp.targets')" />
diff --git a/System.IO.Hashing/packages.config b/System.IO.Hashing/packages.config
index c1985bc..5336b0f 100644
--- a/System.IO.Hashing/packages.config
+++ b/System.IO.Hashing/packages.config
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="nanoFramework.CoreLibrary" version="2.0.0-preview.35" targetFramework="netnano1.0" />
+  <package id="nanoFramework.CoreLibrary" version="2.0.0-preview.39" targetFramework="netnano1.0" />
   <package id="Nerdbank.GitVersioning" version="3.9.50" developmentDependency="true" targetFramework="netnano1.0" />
 </packages>
\ No newline at end of file
diff --git a/System.IO.Hashing/packages.lock.json b/System.IO.Hashing/packages.lock.json
index f85cb78..e04980a 100644
--- a/System.IO.Hashing/packages.lock.json
+++ b/System.IO.Hashing/packages.lock.json
@@ -4,9 +4,9 @@
     ".NETnanoFramework,Version=v1.0": {
       "nanoFramework.CoreLibrary": {
         "type": "Direct",
-        "requested": "[2.0.0-preview.35, 2.0.0-preview.35]",
-        "resolved": "2.0.0-preview.35",
-        "contentHash": "l3LZs5zLeYKP+21DmVykOBWQvcLWOzgOls2JU6R2mRb2cz1+SitRCaEC5bTEJHs888JdHi3xWMVe3GkRzZ/2Lg=="
+        "requested": "[2.0.0-preview.39, 2.0.0-preview.39]",
+        "resolved": "2.0.0-preview.39",
+        "contentHash": "rkXOwaEq6GIm+dKZ7ICMrG23mln482vRXyDtaNfAeBpgGcgiuFJrbw7w0TTZ2DNhw1CUWlCWZZbXi6+/NHdpLg=="
       },
       "Nerdbank.GitVersioning": {
         "type": "Direct",
diff --git a/Tests/System.IO.HashingTests/System.IO.HashingTests.nfproj b/Tests/System.IO.HashingTests/System.IO.HashingTests.nfproj
index cf59794..c05fd00 100644
--- a/Tests/System.IO.HashingTests/System.IO.HashingTests.nfproj
+++ b/Tests/System.IO.HashingTests/System.IO.HashingTests.nfproj
@@ -32,10 +32,10 @@
   </ItemGroup>
   <ItemGroup>
     <Reference Include="mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\..\packages\nanoFramework.CoreLibrary.2.0.0-preview.35\lib\netnano1.0\mscorlib.dll</HintPath>
+      <HintPath>..\..\packages\nanoFramework.CoreLibrary.2.0.0-preview.39\lib\netnano1.0\mscorlib.dll</HintPath>
     </Reference>
     <Reference Include="nanoFramework.System.Text, Version=2.0.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\..\packages\nanoFramework.System.Text.2.0.0-preview.8\lib\nanoFramework.System.Text.dll</HintPath>
+      <HintPath>..\..\packages\nanoFramework.System.Text.2.0.0-preview.13\lib\netnano1.0\nanoFramework.System.Text.dll</HintPath>
     </Reference>
     <Reference Include="nanoFramework.TestFramework">
       <HintPath>..\..\packages\nanoFramework.TestFramework.4.0.0-preview.47\lib\nanoFramework.TestFramework.dll</HintPath>
diff --git a/Tests/System.IO.HashingTests/packages.config b/Tests/System.IO.HashingTests/packages.config
index e922c60..f44b1d8 100644
--- a/Tests/System.IO.HashingTests/packages.config
+++ b/Tests/System.IO.HashingTests/packages.config
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="nanoFramework.CoreLibrary" version="2.0.0-preview.35" targetFramework="netnano1.0" />
-  <package id="nanoFramework.System.Text" version="2.0.0-preview.8" targetFramework="netnano1.0" />
+  <package id="nanoFramework.CoreLibrary" version="2.0.0-preview.39" targetFramework="netnano1.0" />
+  <package id="nanoFramework.System.Text" version="2.0.0-preview.13" targetFramework="netnano1.0" />
   <package id="nanoFramework.TestFramework" version="4.0.0-preview.47" targetFramework="netnano1.0" developmentDependency="true" />
 </packages>
\ No newline at end of file
diff --git a/Tests/System.IO.HashingTests/packages.lock.json b/Tests/System.IO.HashingTests/packages.lock.json
index 8309eea..73efbfd 100644
--- a/Tests/System.IO.HashingTests/packages.lock.json
+++ b/Tests/System.IO.HashingTests/packages.lock.json
@@ -4,15 +4,15 @@
     ".NETnanoFramework,Version=v1.0": {
       "nanoFramework.CoreLibrary": {
         "type": "Direct",
-        "requested": "[2.0.0-preview.35, 2.0.0-preview.35]",
-        "resolved": "2.0.0-preview.35",
-        "contentHash": "l3LZs5zLeYKP+21DmVykOBWQvcLWOzgOls2JU6R2mRb2cz1+SitRCaEC5bTEJHs888JdHi3xWMVe3GkRzZ/2Lg=="
+        "requested": "[2.0.0-preview.39, 2.0.0-preview.39]",
+        "resolved": "2.0.0-preview.39",
+        "contentHash": "rkXOwaEq6GIm+dKZ7ICMrG23mln482vRXyDtaNfAeBpgGcgiuFJrbw7w0TTZ2DNhw1CUWlCWZZbXi6+/NHdpLg=="
       },
       "nanoFramework.System.Text": {
         "type": "Direct",
-        "requested": "[2.0.0-preview.8, 2.0.0-preview.8]",
-        "resolved": "2.0.0-preview.8",
-        "contentHash": "dvaXLJo+X68BVWgXssjk0XXJUwQNwA9h0+wbDgfbE2Hc3/pKljhAvuluD8n4W5MZYJ6YI3I/BhPreBjW7W2Fvw=="
+        "requested": "[2.0.0-preview.13, 2.0.0-preview.13]",
+        "resolved": "2.0.0-preview.13",
+        "contentHash": "kTEKvplebAWeA7j4jb9adST6dxH28Q6c99+Jms6p8cMFxlrUoWhL/GdEiPaPnJSVy1XtsgIfh38WbR757qF8yw=="
       },
       "nanoFramework.TestFramework": {
         "type": "Direct",
diff --git a/nanoFramework.System.IO.Hashing.nuspec b/nanoFramework.System.IO.Hashing.nuspec
index 815577e..d24df77 100644
--- a/nanoFramework.System.IO.Hashing.nuspec
+++ b/nanoFramework.System.IO.Hashing.nuspec
@@ -20,7 +20,7 @@ This package requires a target with nanoFramework.System.IO.Hashing v$nativeVers
     <tags>nanoFramework C# csharp netmf netnf </tags>
     <dependencies>
       <group targetFramework=".NETnanoFramework1.0">
-        <dependency id="nanoFramework.CoreLibrary" version="2.0.0-preview.35" />
+        <dependency id="nanoFramework.CoreLibrary" version="2.0.0-preview.39" />
       </group>
     </dependencies>
   </metadata>