diff --git a/nanoFramework.Networking.Sntp.DELIVERABLES.nuspec b/nanoFramework.Networking.Sntp.DELIVERABLES.nuspec
index 831e325..36fa4b8 100644
--- a/nanoFramework.Networking.Sntp.DELIVERABLES.nuspec
+++ b/nanoFramework.Networking.Sntp.DELIVERABLES.nuspec
@@ -18,7 +18,7 @@
     <tags>
     </tags>
     <dependencies>
-      <dependency id="nanoFramework.CoreLibrary" version="1.10.1-preview.7" />
+      <dependency id="nanoFramework.CoreLibrary" version="1.10.1-preview.9" />
     </dependencies>
   </metadata>
   <files>
diff --git a/nanoFramework.Networking.Sntp.nuspec b/nanoFramework.Networking.Sntp.nuspec
index b031a94..6b9e069 100644
--- a/nanoFramework.Networking.Sntp.nuspec
+++ b/nanoFramework.Networking.Sntp.nuspec
@@ -19,7 +19,7 @@
 This package requires a target with nanoFramework.Networking.Sntp v$nativeVersion$ (checksum $checksum$).</description>
     <tags>nanoFramework C# csharp netmf netnf nanoFramework.Networking.Sntp sntp</tags>
     <dependencies>
-      <dependency id="nanoFramework.CoreLibrary" version="1.10.1-preview.7" />
+      <dependency id="nanoFramework.CoreLibrary" version="1.10.1-preview.9" />
     </dependencies>
   </metadata>
   <files>
diff --git a/nanoFramework.Networking.Sntp/nanoFramework.Networking.Sntp.nfproj b/nanoFramework.Networking.Sntp/nanoFramework.Networking.Sntp.nfproj
index a59eaf7..13f89aa 100644
--- a/nanoFramework.Networking.Sntp/nanoFramework.Networking.Sntp.nfproj
+++ b/nanoFramework.Networking.Sntp/nanoFramework.Networking.Sntp.nfproj
@@ -39,7 +39,7 @@
     </NFMDP_PE_ExcludeClassByName>
   </ItemGroup>
   <ItemGroup>
-    <NFMDP_PE_LoadHints Include="..\packages\nanoFramework.CoreLibrary.1.10.1-preview.7\lib\mscorlib.dll">
+    <NFMDP_PE_LoadHints Include="..\packages\nanoFramework.CoreLibrary.1.10.1-preview.9\lib\mscorlib.dll">
       <InProject>false</InProject>
     </NFMDP_PE_LoadHints>
   </ItemGroup>
@@ -54,7 +54,7 @@
   </ItemGroup>
   <ItemGroup>
     <Reference Include="mscorlib, Version=1.10.1.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\packages\nanoFramework.CoreLibrary.1.10.1-preview.7\lib\mscorlib.dll</HintPath>
+      <HintPath>..\packages\nanoFramework.CoreLibrary.1.10.1-preview.9\lib\mscorlib.dll</HintPath>
       <Private>True</Private>
     </Reference>
   </ItemGroup>
diff --git a/nanoFramework.Networking.Sntp/packages.config b/nanoFramework.Networking.Sntp/packages.config
index 0eac5b5..e4a4549 100644
--- a/nanoFramework.Networking.Sntp/packages.config
+++ b/nanoFramework.Networking.Sntp/packages.config
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="nanoFramework.CoreLibrary" version="1.10.1-preview.7" targetFramework="netnanoframework10" />
+  <package id="nanoFramework.CoreLibrary" version="1.10.1-preview.9" targetFramework="netnanoframework10" />
   <package id="Nerdbank.GitVersioning" version="3.3.37" developmentDependency="true" targetFramework="netnanoframework10" />
 </packages>
\ No newline at end of file