diff --git a/nanoFramework.Runtime.Events.nuspec b/nanoFramework.Runtime.Events.nuspec
index 360eabd..03fc700 100644
--- a/nanoFramework.Runtime.Events.nuspec
+++ b/nanoFramework.Runtime.Events.nuspec
@@ -20,7 +20,7 @@
 This package requires a target with nanoFramework.Runtime.Events v$nativeVersion$ (checksum $checksum$).</description>
     <tags>nanoFramework C# csharp netmf netnf nanoFramework.Runtime.Events</tags>
     <dependencies>
-      <dependency id="nanoFramework.CoreLibrary" version="1.12.0-preview.5" />
+      <dependency id="nanoFramework.CoreLibrary" version="1.12.0-preview.9" />
     </dependencies>
   </metadata>
   <files>
diff --git a/nanoFramework.Runtime.Events/nanoFramework.Runtime.Events.nfproj b/nanoFramework.Runtime.Events/nanoFramework.Runtime.Events.nfproj
index 5bdbb91..a2d6b19 100644
--- a/nanoFramework.Runtime.Events/nanoFramework.Runtime.Events.nfproj
+++ b/nanoFramework.Runtime.Events/nanoFramework.Runtime.Events.nfproj
@@ -57,7 +57,7 @@
   </ItemGroup>
   <ItemGroup>
     <Reference Include="mscorlib, Version=1.12.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\packages\nanoFramework.CoreLibrary.1.12.0-preview.5\lib\mscorlib.dll</HintPath>
+      <HintPath>..\packages\nanoFramework.CoreLibrary.1.12.0-preview.9\lib\mscorlib.dll</HintPath>
       <Private>True</Private>
     </Reference>
   </ItemGroup>
diff --git a/nanoFramework.Runtime.Events/packages.config b/nanoFramework.Runtime.Events/packages.config
index ba4b1cf..a9d8b47 100644
--- a/nanoFramework.Runtime.Events/packages.config
+++ b/nanoFramework.Runtime.Events/packages.config
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="nanoFramework.CoreLibrary" version="1.12.0-preview.5" targetFramework="netnanoframework10" />
+  <package id="nanoFramework.CoreLibrary" version="1.12.0-preview.9" targetFramework="netnanoframework10" />
   <package id="Nerdbank.GitVersioning" version="3.1.91" developmentDependency="true" targetFramework="netnanoframework10" />
 </packages>
\ No newline at end of file