diff --git a/System.IO.Ports/System.IO.Ports.nfproj b/System.IO.Ports/System.IO.Ports.nfproj
index 03da875..3e4085e 100644
--- a/System.IO.Ports/System.IO.Ports.nfproj
+++ b/System.IO.Ports/System.IO.Ports.nfproj
@@ -61,10 +61,10 @@
   </ItemGroup>
   <ItemGroup>
     <Reference Include="mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\packages\nanoFramework.CoreLibrary.2.0.0-preview.49\lib\netnano1.0\mscorlib.dll</HintPath>
+      <HintPath>..\packages\nanoFramework.CoreLibrary.2.0.0-preview.52\lib\netnano1.0\mscorlib.dll</HintPath>
     </Reference>
     <Reference Include="nanoFramework.Runtime.Events, Version=2.0.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\packages\nanoFramework.Runtime.Events.2.0.0-preview.12\lib\netnano1.0\nanoFramework.Runtime.Events.dll</HintPath>
+      <HintPath>..\packages\nanoFramework.Runtime.Events.2.0.0-preview.13\lib\netnano1.0\nanoFramework.Runtime.Events.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.18\lib\netnano1.0\nanoFramework.System.Text.dll</HintPath>
diff --git a/System.IO.Ports/packages.config b/System.IO.Ports/packages.config
index 2fb1c96..2cca2fd 100644
--- a/System.IO.Ports/packages.config
+++ b/System.IO.Ports/packages.config
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="nanoFramework.CoreLibrary" version="2.0.0-preview.49" targetFramework="netnano1.0" />
-  <package id="nanoFramework.Runtime.Events" version="2.0.0-preview.12" targetFramework="netnano1.0" />
+  <package id="nanoFramework.CoreLibrary" version="2.0.0-preview.52" targetFramework="netnano1.0" />
+  <package id="nanoFramework.Runtime.Events" version="2.0.0-preview.13" targetFramework="netnano1.0" />
   <package id="nanoFramework.System.IO.Streams" version="2.0.0-preview.18" targetFramework="netnano1.0" />
   <package id="nanoFramework.System.Text" version="2.0.0-preview.18" targetFramework="netnano1.0" />
   <package id="Nerdbank.GitVersioning" version="3.9.50" developmentDependency="true" targetFramework="netnano1.0" />
diff --git a/System.IO.Ports/packages.lock.json b/System.IO.Ports/packages.lock.json
index a34ca32..3c97c59 100644
--- a/System.IO.Ports/packages.lock.json
+++ b/System.IO.Ports/packages.lock.json
@@ -4,15 +4,15 @@
     ".NETnanoFramework,Version=v1.0": {
       "nanoFramework.CoreLibrary": {
         "type": "Direct",
-        "requested": "[2.0.0-preview.49, 2.0.0-preview.49]",
-        "resolved": "2.0.0-preview.49",
-        "contentHash": "/8/fw1qqEql05aelTR9QQi4ZF2M+Mdwuemjf9rul8yaOpl6jjnhhKfdRJMh4+BXp5VjwTZsALJVpp2aN+e7vzw=="
+        "requested": "[2.0.0-preview.52, 2.0.0-preview.52]",
+        "resolved": "2.0.0-preview.52",
+        "contentHash": "cV9JEhoc2OV/UL602i5xmEwQpnn/gzVMlDTAIAMRxCNwBKNYLO9U50OkJykpGnO2SULTsmvFqQWEGZiuANBZHw=="
       },
       "nanoFramework.Runtime.Events": {
         "type": "Direct",
-        "requested": "[2.0.0-preview.12, 2.0.0-preview.12]",
-        "resolved": "2.0.0-preview.12",
-        "contentHash": "49clC9iMibQ7Sm73xShGsKqjee54JZ7QGuxys1wPkG2tvHIziGtb51U+RxdfdVGz/UtSv9q5ebqo0IYlk7BFxw=="
+        "requested": "[2.0.0-preview.13, 2.0.0-preview.13]",
+        "resolved": "2.0.0-preview.13",
+        "contentHash": "LmPsdvTKJ5HiJbX0FNFWWIvHh23kWmKWCIHggSnMrjaZnjXubqct75mQiB2aWtC7IW0PjGxB2A4cvtle3Zjvzg=="
       },
       "nanoFramework.System.IO.Streams": {
         "type": "Direct",
diff --git a/Tests/UnitTestsSerialPort/UnitTestsSerialPort.nfproj b/Tests/UnitTestsSerialPort/UnitTestsSerialPort.nfproj
index 0694312..d8ee650 100644
--- a/Tests/UnitTestsSerialPort/UnitTestsSerialPort.nfproj
+++ b/Tests/UnitTestsSerialPort/UnitTestsSerialPort.nfproj
@@ -41,13 +41,13 @@
   </ItemGroup>
   <ItemGroup>
     <Reference Include="mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\..\packages\nanoFramework.CoreLibrary.2.0.0-preview.49\lib\netnano1.0\mscorlib.dll</HintPath>
+      <HintPath>..\..\packages\nanoFramework.CoreLibrary.2.0.0-preview.52\lib\netnano1.0\mscorlib.dll</HintPath>
     </Reference>
     <Reference Include="nanoFramework.Hardware.Esp32, Version=2.0.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
       <HintPath>..\..\packages\nanoFramework.Hardware.Esp32.2.0.0-preview.11\lib\netnano1.0\nanoFramework.Hardware.Esp32.dll</HintPath>
     </Reference>
     <Reference Include="nanoFramework.Runtime.Events, Version=2.0.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\..\packages\nanoFramework.Runtime.Events.2.0.0-preview.12\lib\netnano1.0\nanoFramework.Runtime.Events.dll</HintPath>
+      <HintPath>..\..\packages\nanoFramework.Runtime.Events.2.0.0-preview.13\lib\netnano1.0\nanoFramework.Runtime.Events.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.18\lib\netnano1.0\nanoFramework.System.Text.dll</HintPath>
diff --git a/Tests/UnitTestsSerialPort/packages.config b/Tests/UnitTestsSerialPort/packages.config
index 578bb46..85e0bab 100644
--- a/Tests/UnitTestsSerialPort/packages.config
+++ b/Tests/UnitTestsSerialPort/packages.config
@@ -1,8 +1,8 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="nanoFramework.CoreLibrary" version="2.0.0-preview.49" targetFramework="netnano1.0" />
+  <package id="nanoFramework.CoreLibrary" version="2.0.0-preview.52" targetFramework="netnano1.0" />
   <package id="nanoFramework.Hardware.Esp32" version="2.0.0-preview.11" targetFramework="netnano1.0" />
-  <package id="nanoFramework.Runtime.Events" version="2.0.0-preview.12" targetFramework="netnano1.0" />
+  <package id="nanoFramework.Runtime.Events" version="2.0.0-preview.13" targetFramework="netnano1.0" />
   <package id="nanoFramework.System.IO.Streams" version="2.0.0-preview.18" targetFramework="netnano1.0" />
   <package id="nanoFramework.System.Text" version="2.0.0-preview.18" targetFramework="netnano1.0" />
   <package id="nanoFramework.TestFramework" version="4.0.0-preview.58" targetFramework="netnano1.0" developmentDependency="true" />
diff --git a/Tests/UnitTestsSerialPort/packages.lock.json b/Tests/UnitTestsSerialPort/packages.lock.json
index 3509414..f4db88e 100644
--- a/Tests/UnitTestsSerialPort/packages.lock.json
+++ b/Tests/UnitTestsSerialPort/packages.lock.json
@@ -4,9 +4,9 @@
     ".NETnanoFramework,Version=v1.0": {
       "nanoFramework.CoreLibrary": {
         "type": "Direct",
-        "requested": "[2.0.0-preview.49, 2.0.0-preview.49]",
-        "resolved": "2.0.0-preview.49",
-        "contentHash": "/8/fw1qqEql05aelTR9QQi4ZF2M+Mdwuemjf9rul8yaOpl6jjnhhKfdRJMh4+BXp5VjwTZsALJVpp2aN+e7vzw=="
+        "requested": "[2.0.0-preview.52, 2.0.0-preview.52]",
+        "resolved": "2.0.0-preview.52",
+        "contentHash": "cV9JEhoc2OV/UL602i5xmEwQpnn/gzVMlDTAIAMRxCNwBKNYLO9U50OkJykpGnO2SULTsmvFqQWEGZiuANBZHw=="
       },
       "nanoFramework.Hardware.Esp32": {
         "type": "Direct",
@@ -16,9 +16,9 @@
       },
       "nanoFramework.Runtime.Events": {
         "type": "Direct",
-        "requested": "[2.0.0-preview.12, 2.0.0-preview.12]",
-        "resolved": "2.0.0-preview.12",
-        "contentHash": "49clC9iMibQ7Sm73xShGsKqjee54JZ7QGuxys1wPkG2tvHIziGtb51U+RxdfdVGz/UtSv9q5ebqo0IYlk7BFxw=="
+        "requested": "[2.0.0-preview.13, 2.0.0-preview.13]",
+        "resolved": "2.0.0-preview.13",
+        "contentHash": "LmPsdvTKJ5HiJbX0FNFWWIvHh23kWmKWCIHggSnMrjaZnjXubqct75mQiB2aWtC7IW0PjGxB2A4cvtle3Zjvzg=="
       },
       "nanoFramework.System.IO.Streams": {
         "type": "Direct",
diff --git a/nanoFramework.System.IO.Ports.nuspec b/nanoFramework.System.IO.Ports.nuspec
index 826c354..2421d78 100644
--- a/nanoFramework.System.IO.Ports.nuspec
+++ b/nanoFramework.System.IO.Ports.nuspec
@@ -20,8 +20,8 @@ This package requires a target with System.IO.Ports v$nativeVersion$ (checksum $
     <tags>nanoFramework C# csharp netmf netnf System.IO.Ports</tags>
     <dependencies>
       <group targetFramework=".NETnanoFramework1.0">
-        <dependency id="nanoFramework.CoreLibrary" version="2.0.0-preview.49" />
-        <dependency id="nanoFramework.Runtime.Events" version="2.0.0-preview.12" />
+        <dependency id="nanoFramework.CoreLibrary" version="2.0.0-preview.52" />
+        <dependency id="nanoFramework.Runtime.Events" version="2.0.0-preview.13" />
         <dependency id="nanoFramework.System.IO.Streams" version="2.0.0-preview.18" />
       </group>
     </dependencies>