diff --git a/source/nanoFramework.System.Net.Http-client/System.Net.Http-client.nfproj b/source/nanoFramework.System.Net.Http-client/System.Net.Http-client.nfproj
index 088c3c39..5ed7cf9d 100644
--- a/source/nanoFramework.System.Net.Http-client/System.Net.Http-client.nfproj
+++ b/source/nanoFramework.System.Net.Http-client/System.Net.Http-client.nfproj
@@ -38,13 +38,13 @@
     </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>
-    <NFMDP_PE_LoadHints Include="..\packages\nanoFramework.Runtime.Events.1.4.2-preview.1\lib\nanoFramework.Runtime.Events.dll">
+    <NFMDP_PE_LoadHints Include="..\packages\nanoFramework.Runtime.Events.1.4.2-preview.2\lib\nanoFramework.Runtime.Events.dll">
       <InProject>false</InProject>
     </NFMDP_PE_LoadHints>
-    <NFMDP_PE_LoadHints Include="..\packages\nanoFramework.System.Collections.1.0.1-preview.1\lib\nanoFramework.System.Collections.dll">
+    <NFMDP_PE_LoadHints Include="..\packages\nanoFramework.System.Collections.1.0.1-preview.2\lib\nanoFramework.System.Collections.dll">
       <InProject>false</InProject>
     </NFMDP_PE_LoadHints>
     <NFMDP_PE_LoadHints Include="..\packages\nanoFramework.System.Text.1.0.0-preview.8\lib\nanoFramework.System.Text.dll">
@@ -144,16 +144,16 @@
     <Folder Include="Properties\" />
   </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>
     <Reference Include="nanoFramework.Runtime.Events, Version=1.4.2.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\packages\nanoFramework.Runtime.Events.1.4.2-preview.1\lib\nanoFramework.Runtime.Events.dll</HintPath>
+      <HintPath>..\packages\nanoFramework.Runtime.Events.1.4.2-preview.2\lib\nanoFramework.Runtime.Events.dll</HintPath>
       <Private>True</Private>
     </Reference>
     <Reference Include="nanoFramework.System.Collections, Version=1.0.1.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\packages\nanoFramework.System.Collections.1.0.1-preview.1\lib\nanoFramework.System.Collections.dll</HintPath>
+      <HintPath>..\packages\nanoFramework.System.Collections.1.0.1-preview.2\lib\nanoFramework.System.Collections.dll</HintPath>
       <Private>True</Private>
     </Reference>
     <Reference Include="nanoFramework.System.Text, Version=1.0.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
diff --git a/source/nanoFramework.System.Net.Http-client/packages.config b/source/nanoFramework.System.Net.Http-client/packages.config
index 17222bde..68ce13ea 100644
--- a/source/nanoFramework.System.Net.Http-client/packages.config
+++ b/source/nanoFramework.System.Net.Http-client/packages.config
@@ -1,8 +1,8 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="nanoFramework.CoreLibrary" version="1.7.0-preview.12" targetFramework="netnanoframework10" />
-  <package id="nanoFramework.Runtime.Events" version="1.4.2-preview.1" targetFramework="netnanoframework10" />
-  <package id="nanoFramework.System.Collections" version="1.0.1-preview.1" targetFramework="netnanoframework10" />
+  <package id="nanoFramework.CoreLibrary" version="1.7.1-preview.4" targetFramework="netnanoframework10" />
+  <package id="nanoFramework.Runtime.Events" version="1.4.2-preview.2" targetFramework="netnanoframework10" />
+  <package id="nanoFramework.System.Collections" version="1.0.1-preview.2" targetFramework="netnanoframework10" />
   <package id="nanoFramework.System.Net" version="1.4.1-preview.12" targetFramework="netnanoframework10" />
   <package id="nanoFramework.System.Text" version="1.0.0-preview.8" targetFramework="netnanoframework10" />
   <package id="Nerdbank.GitVersioning" version="3.1.68" developmentDependency="true" targetFramework="netnanoframework10" />
diff --git a/source/nanoFramework.System.Net.Http-server/System.Net.Http-server.nfproj b/source/nanoFramework.System.Net.Http-server/System.Net.Http-server.nfproj
index b4566021..c1d78fcb 100644
--- a/source/nanoFramework.System.Net.Http-server/System.Net.Http-server.nfproj
+++ b/source/nanoFramework.System.Net.Http-server/System.Net.Http-server.nfproj
@@ -38,13 +38,13 @@
     </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>
-    <NFMDP_PE_LoadHints Include="..\packages\nanoFramework.Runtime.Events.1.4.2-preview.1\lib\nanoFramework.Runtime.Events.dll">
+    <NFMDP_PE_LoadHints Include="..\packages\nanoFramework.Runtime.Events.1.4.2-preview.2\lib\nanoFramework.Runtime.Events.dll">
       <InProject>false</InProject>
     </NFMDP_PE_LoadHints>
-    <NFMDP_PE_LoadHints Include="..\packages\nanoFramework.System.Collections.1.0.1-preview.1\lib\nanoFramework.System.Collections.dll">
+    <NFMDP_PE_LoadHints Include="..\packages\nanoFramework.System.Collections.1.0.1-preview.2\lib\nanoFramework.System.Collections.dll">
       <InProject>false</InProject>
     </NFMDP_PE_LoadHints>
     <NFMDP_PE_LoadHints Include="..\packages\nanoFramework.System.Text.1.0.0-preview.8\lib\nanoFramework.System.Text.dll">
@@ -138,16 +138,16 @@
     <Folder Include="Http\" />
   </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>
     <Reference Include="nanoFramework.Runtime.Events, Version=1.4.2.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\packages\nanoFramework.Runtime.Events.1.4.2-preview.1\lib\nanoFramework.Runtime.Events.dll</HintPath>
+      <HintPath>..\packages\nanoFramework.Runtime.Events.1.4.2-preview.2\lib\nanoFramework.Runtime.Events.dll</HintPath>
       <Private>True</Private>
     </Reference>
     <Reference Include="nanoFramework.System.Collections, Version=1.0.1.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\packages\nanoFramework.System.Collections.1.0.1-preview.1\lib\nanoFramework.System.Collections.dll</HintPath>
+      <HintPath>..\packages\nanoFramework.System.Collections.1.0.1-preview.2\lib\nanoFramework.System.Collections.dll</HintPath>
       <Private>True</Private>
     </Reference>
     <Reference Include="nanoFramework.System.Text, Version=1.0.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
diff --git a/source/nanoFramework.System.Net.Http-server/packages.config b/source/nanoFramework.System.Net.Http-server/packages.config
index 17222bde..68ce13ea 100644
--- a/source/nanoFramework.System.Net.Http-server/packages.config
+++ b/source/nanoFramework.System.Net.Http-server/packages.config
@@ -1,8 +1,8 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="nanoFramework.CoreLibrary" version="1.7.0-preview.12" targetFramework="netnanoframework10" />
-  <package id="nanoFramework.Runtime.Events" version="1.4.2-preview.1" targetFramework="netnanoframework10" />
-  <package id="nanoFramework.System.Collections" version="1.0.1-preview.1" targetFramework="netnanoframework10" />
+  <package id="nanoFramework.CoreLibrary" version="1.7.1-preview.4" targetFramework="netnanoframework10" />
+  <package id="nanoFramework.Runtime.Events" version="1.4.2-preview.2" targetFramework="netnanoframework10" />
+  <package id="nanoFramework.System.Collections" version="1.0.1-preview.2" targetFramework="netnanoframework10" />
   <package id="nanoFramework.System.Net" version="1.4.1-preview.12" targetFramework="netnanoframework10" />
   <package id="nanoFramework.System.Text" version="1.0.0-preview.8" targetFramework="netnanoframework10" />
   <package id="Nerdbank.GitVersioning" version="3.1.68" developmentDependency="true" targetFramework="netnanoframework10" />
diff --git a/source/nanoFramework.System.Net.Http.Client.nuspec b/source/nanoFramework.System.Net.Http.Client.nuspec
index 058feaa6..2e2c2231 100644
--- a/source/nanoFramework.System.Net.Http.Client.nuspec
+++ b/source/nanoFramework.System.Net.Http.Client.nuspec
@@ -23,9 +23,9 @@ There is also a package with the server API only and another with the full API.
     <summary>nanoFramework.System.Net.Http assembly (client API only) for nanoFramework C# projects</summary>
     <tags>nanoFramework C# csharp netmf netnf nanoFramework.System.Net.Http</tags>
     <dependencies>
-      <dependency id="nanoFramework.CoreLibrary" version="1.7.0-preview.12" />
-      <dependency id="nanoFramework.Runtime.Events" version="1.4.2-preview.1" />
-      <dependency id="nanoFramework.System.Collections" version="1.0.1-preview.1" />
+      <dependency id="nanoFramework.CoreLibrary" version="1.7.1-preview.4" />
+      <dependency id="nanoFramework.Runtime.Events" version="1.4.2-preview.2" />
+      <dependency id="nanoFramework.System.Collections" version="1.0.1-preview.2" />
       <dependency id="nanoFramework.System.Text" version="1.0.0-preview.8" />
       <dependency id="nanoFramework.System.Net" version="1.4.1-preview.12" />
     </dependencies>
diff --git a/source/nanoFramework.System.Net.Http.Server.nuspec b/source/nanoFramework.System.Net.Http.Server.nuspec
index e6a0301c..b69aa240 100644
--- a/source/nanoFramework.System.Net.Http.Server.nuspec
+++ b/source/nanoFramework.System.Net.Http.Server.nuspec
@@ -23,9 +23,9 @@ There is also a package with the client API only and another with the full API.
     <summary>nanoFramework.System.Net.Http assembly (server API only) for nanoFramework C# projects</summary>
     <tags>nanoFramework C# csharp netmf netnf nanoFramework.System.Net.Http</tags>
     <dependencies>
-      <dependency id="nanoFramework.CoreLibrary" version="1.7.0-preview.12" />
-      <dependency id="nanoFramework.Runtime.Events" version="1.4.2-preview.1" />
-      <dependency id="nanoFramework.System.Collections" version="1.0.1-preview.1" />
+      <dependency id="nanoFramework.CoreLibrary" version="1.7.1-preview.4" />
+      <dependency id="nanoFramework.Runtime.Events" version="1.4.2-preview.2" />
+      <dependency id="nanoFramework.System.Collections" version="1.0.1-preview.2" />
       <dependency id="nanoFramework.System.Text" version="1.0.0-preview.8" />
       <dependency id="nanoFramework.System.Net" version="1.4.1-preview.12" />
     </dependencies>
diff --git a/source/nanoFramework.System.Net.Http.nuspec b/source/nanoFramework.System.Net.Http.nuspec
index 446ff6d8..23c18cdc 100644
--- a/source/nanoFramework.System.Net.Http.nuspec
+++ b/source/nanoFramework.System.Net.Http.nuspec
@@ -24,9 +24,9 @@ There are also two other packages with just the client API and just the server A
     <summary>nanoFramework.System.Net.Http assembly for nanoFramework C# projects</summary>
     <tags>nanoFramework C# csharp netmf netnf nanoFramework.System.Net.Http</tags>
     <dependencies>
-      <dependency id="nanoFramework.CoreLibrary" version="1.7.0-preview.12" />
-      <dependency id="nanoFramework.Runtime.Events" version="1.4.2-preview.1" />
-      <dependency id="nanoFramework.System.Collections" version="1.0.1-preview.1" />
+      <dependency id="nanoFramework.CoreLibrary" version="1.7.1-preview.4" />
+      <dependency id="nanoFramework.Runtime.Events" version="1.4.2-preview.2" />
+      <dependency id="nanoFramework.System.Collections" version="1.0.1-preview.2" />
       <dependency id="nanoFramework.System.Text" version="1.0.0-preview.8" />
       <dependency id="nanoFramework.System.Net" version="1.4.1-preview.12" />
     </dependencies>
diff --git a/source/nanoFramework.System.Net.Http/System.Net.Http.nfproj b/source/nanoFramework.System.Net.Http/System.Net.Http.nfproj
index da74f7f0..144b53e8 100644
--- a/source/nanoFramework.System.Net.Http/System.Net.Http.nfproj
+++ b/source/nanoFramework.System.Net.Http/System.Net.Http.nfproj
@@ -38,13 +38,13 @@
     </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>
-    <NFMDP_PE_LoadHints Include="..\packages\nanoFramework.Runtime.Events.1.4.2-preview.1\lib\nanoFramework.Runtime.Events.dll">
+    <NFMDP_PE_LoadHints Include="..\packages\nanoFramework.Runtime.Events.1.4.2-preview.2\lib\nanoFramework.Runtime.Events.dll">
       <InProject>false</InProject>
     </NFMDP_PE_LoadHints>
-    <NFMDP_PE_LoadHints Include="..\packages\nanoFramework.System.Collections.1.0.1-preview.1\lib\nanoFramework.System.Collections.dll">
+    <NFMDP_PE_LoadHints Include="..\packages\nanoFramework.System.Collections.1.0.1-preview.2\lib\nanoFramework.System.Collections.dll">
       <InProject>false</InProject>
     </NFMDP_PE_LoadHints>
     <NFMDP_PE_LoadHints Include="..\packages\nanoFramework.System.Text.1.0.0-preview.8\lib\nanoFramework.System.Text.dll">
@@ -92,16 +92,16 @@
     <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>
     <Reference Include="nanoFramework.Runtime.Events, Version=1.4.2.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\packages\nanoFramework.Runtime.Events.1.4.2-preview.1\lib\nanoFramework.Runtime.Events.dll</HintPath>
+      <HintPath>..\packages\nanoFramework.Runtime.Events.1.4.2-preview.2\lib\nanoFramework.Runtime.Events.dll</HintPath>
       <Private>True</Private>
     </Reference>
     <Reference Include="nanoFramework.System.Collections, Version=1.0.1.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\packages\nanoFramework.System.Collections.1.0.1-preview.1\lib\nanoFramework.System.Collections.dll</HintPath>
+      <HintPath>..\packages\nanoFramework.System.Collections.1.0.1-preview.2\lib\nanoFramework.System.Collections.dll</HintPath>
       <Private>True</Private>
     </Reference>
     <Reference Include="nanoFramework.System.Text, Version=1.0.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
diff --git a/source/nanoFramework.System.Net.Http/packages.config b/source/nanoFramework.System.Net.Http/packages.config
index 17222bde..68ce13ea 100644
--- a/source/nanoFramework.System.Net.Http/packages.config
+++ b/source/nanoFramework.System.Net.Http/packages.config
@@ -1,8 +1,8 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="nanoFramework.CoreLibrary" version="1.7.0-preview.12" targetFramework="netnanoframework10" />
-  <package id="nanoFramework.Runtime.Events" version="1.4.2-preview.1" targetFramework="netnanoframework10" />
-  <package id="nanoFramework.System.Collections" version="1.0.1-preview.1" targetFramework="netnanoframework10" />
+  <package id="nanoFramework.CoreLibrary" version="1.7.1-preview.4" targetFramework="netnanoframework10" />
+  <package id="nanoFramework.Runtime.Events" version="1.4.2-preview.2" targetFramework="netnanoframework10" />
+  <package id="nanoFramework.System.Collections" version="1.0.1-preview.2" targetFramework="netnanoframework10" />
   <package id="nanoFramework.System.Net" version="1.4.1-preview.12" targetFramework="netnanoframework10" />
   <package id="nanoFramework.System.Text" version="1.0.0-preview.8" targetFramework="netnanoframework10" />
   <package id="Nerdbank.GitVersioning" version="3.1.68" developmentDependency="true" targetFramework="netnanoframework10" />