diff --git a/Tests/NFUnitTestStringBuilder/NFUnitTestStringBuilder.nfproj b/Tests/NFUnitTestStringBuilder/NFUnitTestStringBuilder.nfproj
index 49faa12..2b567c2 100644
--- a/Tests/NFUnitTestStringBuilder/NFUnitTestStringBuilder.nfproj
+++ b/Tests/NFUnitTestStringBuilder/NFUnitTestStringBuilder.nfproj
@@ -31,16 +31,16 @@
     <Compile Include="StringBuilderTests.cs" />
   </ItemGroup>
   <ItemGroup>
-    <Reference Include="mscorlib, Version=1.14.3.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\..\packages\nanoFramework.CoreLibrary.1.14.2\lib\mscorlib.dll</HintPath>
+    <Reference Include="mscorlib, Version=1.15.6.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
+      <HintPath>..\..\packages\nanoFramework.CoreLibrary.1.15.5\lib\mscorlib.dll</HintPath>
       <Private>True</Private>
     </Reference>
-    <Reference Include="nanoFramework.TestFramework, Version=2.1.85.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\..\packages\nanoFramework.TestFramework.2.1.85\lib\nanoFramework.TestFramework.dll</HintPath>
+    <Reference Include="nanoFramework.TestFramework, Version=2.1.87.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
+      <HintPath>..\..\packages\nanoFramework.TestFramework.2.1.87\lib\nanoFramework.TestFramework.dll</HintPath>
       <Private>True</Private>
     </Reference>
     <Reference Include="nanoFramework.UnitTestLauncher, Version=0.0.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\..\packages\nanoFramework.TestFramework.2.1.85\lib\nanoFramework.UnitTestLauncher.exe</HintPath>
+      <HintPath>..\..\packages\nanoFramework.TestFramework.2.1.87\lib\nanoFramework.UnitTestLauncher.exe</HintPath>
       <Private>True</Private>
     </Reference>
   </ItemGroup>
diff --git a/Tests/NFUnitTestStringBuilder/packages.config b/Tests/NFUnitTestStringBuilder/packages.config
index 7704bd8..9af75e9 100644
--- a/Tests/NFUnitTestStringBuilder/packages.config
+++ b/Tests/NFUnitTestStringBuilder/packages.config
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="nanoFramework.CoreLibrary" version="1.14.2" targetFramework="netnano1.0" />
-  <package id="nanoFramework.TestFramework" version="2.1.85" targetFramework="netnano1.0" developmentDependency="true" />
+  <package id="nanoFramework.CoreLibrary" version="1.15.5" targetFramework="netnano1.0" />
+  <package id="nanoFramework.TestFramework" version="2.1.87" targetFramework="netnano1.0" developmentDependency="true" />
 </packages>
\ No newline at end of file
diff --git a/Tests/NFUnitTestStringBuilder/packages.lock.json b/Tests/NFUnitTestStringBuilder/packages.lock.json
index a933330..2215522 100644
--- a/Tests/NFUnitTestStringBuilder/packages.lock.json
+++ b/Tests/NFUnitTestStringBuilder/packages.lock.json
@@ -4,15 +4,15 @@
     ".NETnanoFramework,Version=v1.0": {
       "nanoFramework.CoreLibrary": {
         "type": "Direct",
-        "requested": "[1.14.2, 1.14.2]",
-        "resolved": "1.14.2",
-        "contentHash": "j1mrz4mitl5LItvmHMsw1aHzCAfvTTgIkRxA0mhs5mSpctJ/BBcuNwua5j3MspfRNKreCQPy/qZy/D9ADLL/PA=="
+        "requested": "[1.15.5, 1.15.5]",
+        "resolved": "1.15.5",
+        "contentHash": "u2+GvAp1uxLrGdILACAZy+EVKOs28EQ52j8Lz7599egXZ3GBGejjnR2ofhjMQwzrJLlgtyrsx8nSLngDfJNsAg=="
       },
       "nanoFramework.TestFramework": {
         "type": "Direct",
-        "requested": "[2.1.85, 2.1.85]",
-        "resolved": "2.1.85",
-        "contentHash": "UAydT9MgZfufPcLpn5KbFZkR3ul6zSt9ERYDPDen7IWxeT+fGpRTes8QTWfhgMsxF3E27b3wI6K6wwWQkeGuFQ=="
+        "requested": "[2.1.87, 2.1.87]",
+        "resolved": "2.1.87",
+        "contentHash": "58nW0UByML7fciTfvLfaEwysf6319SQWmah9v6N3xF9E7jWiHnh3FfEN/wtP/E2wwufmiFZAO2CidbiuEEJmKA=="
       }
     }
   }
diff --git a/nanoFramework.System.Text.Benchmark/nanoFramework.System.Text.Benchmark.nfproj b/nanoFramework.System.Text.Benchmark/nanoFramework.System.Text.Benchmark.nfproj
index 272efb1..13bdcaa 100644
--- a/nanoFramework.System.Text.Benchmark/nanoFramework.System.Text.Benchmark.nfproj
+++ b/nanoFramework.System.Text.Benchmark/nanoFramework.System.Text.Benchmark.nfproj
@@ -26,8 +26,8 @@
     <Compile Include="StringBenchmark.cs" />
   </ItemGroup>
   <ItemGroup>
-    <Reference Include="mscorlib, Version=1.14.3.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\packages\nanoFramework.CoreLibrary.1.14.2\lib\mscorlib.dll</HintPath>
+    <Reference Include="mscorlib, Version=1.15.6.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
+      <HintPath>..\packages\nanoFramework.CoreLibrary.1.15.5\lib\mscorlib.dll</HintPath>
       <Private>True</Private>
     </Reference>
     <Reference Include="nanoFramework.Benchmark, Version=1.0.56.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
@@ -38,12 +38,12 @@
       <HintPath>..\packages\nanoFramework.Logging.1.1.63\lib\nanoFramework.Logging.dll</HintPath>
       <Private>True</Private>
     </Reference>
-    <Reference Include="nanoFramework.Runtime.Native, Version=1.6.6.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\packages\nanoFramework.Runtime.Native.1.6.6\lib\nanoFramework.Runtime.Native.dll</HintPath>
+    <Reference Include="nanoFramework.Runtime.Native, Version=1.6.12.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
+      <HintPath>..\packages\nanoFramework.Runtime.Native.1.6.12\lib\nanoFramework.Runtime.Native.dll</HintPath>
       <Private>True</Private>
     </Reference>
-    <Reference Include="nanoFramework.System.Collections, Version=1.5.18.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\packages\nanoFramework.System.Collections.1.5.18\lib\nanoFramework.System.Collections.dll</HintPath>
+    <Reference Include="nanoFramework.System.Collections, Version=1.5.31.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
+      <HintPath>..\packages\nanoFramework.System.Collections.1.5.31\lib\nanoFramework.System.Collections.dll</HintPath>
       <Private>True</Private>
     </Reference>
     <Reference Include="nanoFramework.System.Text, Version=1.2.37.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
@@ -51,7 +51,7 @@
       <Private>True</Private>
     </Reference>
     <Reference Include="System.Diagnostics.Stopwatch, Version=1.2.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\packages\nanoFramework.System.Diagnostics.Stopwatch.1.2.325\lib\System.Diagnostics.Stopwatch.dll</HintPath>
+      <HintPath>..\packages\nanoFramework.System.Diagnostics.Stopwatch.1.2.418\lib\System.Diagnostics.Stopwatch.dll</HintPath>
       <Private>True</Private>
     </Reference>
   </ItemGroup>
diff --git a/nanoFramework.System.Text.Benchmark/packages.config b/nanoFramework.System.Text.Benchmark/packages.config
index 4570547..397d240 100644
--- a/nanoFramework.System.Text.Benchmark/packages.config
+++ b/nanoFramework.System.Text.Benchmark/packages.config
@@ -1,10 +1,10 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
   <package id="nanoFramework.Benchmark" version="1.0.56" targetFramework="netnano1.0" />
-  <package id="nanoFramework.CoreLibrary" version="1.14.2" targetFramework="netnano1.0" />
+  <package id="nanoFramework.CoreLibrary" version="1.15.5" targetFramework="netnano1.0" />
   <package id="nanoFramework.Logging" version="1.1.63" targetFramework="netnano1.0" />
-  <package id="nanoFramework.Runtime.Native" version="1.6.6" targetFramework="netnano1.0" />
-  <package id="nanoFramework.System.Collections" version="1.5.18" targetFramework="netnano1.0" />
-  <package id="nanoFramework.System.Diagnostics.Stopwatch" version="1.2.325" targetFramework="netnano1.0" />
+  <package id="nanoFramework.Runtime.Native" version="1.6.12" targetFramework="netnano1.0" />
+  <package id="nanoFramework.System.Collections" version="1.5.31" targetFramework="netnano1.0" />
+  <package id="nanoFramework.System.Diagnostics.Stopwatch" version="1.2.418" targetFramework="netnano1.0" />
   <package id="nanoFramework.System.Text" version="1.2.37" targetFramework="netnano1.0" />
 </packages>
\ No newline at end of file
diff --git a/nanoFramework.System.Text.Benchmark/packages.lock.json b/nanoFramework.System.Text.Benchmark/packages.lock.json
index ff39ea3..8314c2f 100644
--- a/nanoFramework.System.Text.Benchmark/packages.lock.json
+++ b/nanoFramework.System.Text.Benchmark/packages.lock.json
@@ -10,9 +10,9 @@
       },
       "nanoFramework.CoreLibrary": {
         "type": "Direct",
-        "requested": "[1.14.2, 1.14.2]",
-        "resolved": "1.14.2",
-        "contentHash": "j1mrz4mitl5LItvmHMsw1aHzCAfvTTgIkRxA0mhs5mSpctJ/BBcuNwua5j3MspfRNKreCQPy/qZy/D9ADLL/PA=="
+        "requested": "[1.15.5, 1.15.5]",
+        "resolved": "1.15.5",
+        "contentHash": "u2+GvAp1uxLrGdILACAZy+EVKOs28EQ52j8Lz7599egXZ3GBGejjnR2ofhjMQwzrJLlgtyrsx8nSLngDfJNsAg=="
       },
       "nanoFramework.Logging": {
         "type": "Direct",
@@ -22,21 +22,21 @@
       },
       "nanoFramework.Runtime.Native": {
         "type": "Direct",
-        "requested": "[1.6.6, 1.6.6]",
-        "resolved": "1.6.6",
-        "contentHash": "ySEYUh8bTiFYAUce3uQLfOvvnunTx10j7Xsw+ChlS+nXFC/kCctgTob7k1McZrxqTs0CZo+Ux5eW4oYKzx25aw=="
+        "requested": "[1.6.12, 1.6.12]",
+        "resolved": "1.6.12",
+        "contentHash": "RlJ882CK7D2HkkGHDw1a2xgiEM+1+Nd6iTA+OmzF5QIxbv0SX9qBesueIWsc6RsiQGqBEeBXh4zZ2+TBGL62VQ=="
       },
       "nanoFramework.System.Collections": {
         "type": "Direct",
-        "requested": "[1.5.18, 1.5.18]",
-        "resolved": "1.5.18",
-        "contentHash": "F8FzaUC5D2xd6eQja33EYcknOFqWT+YEcnEn849ILJTGSedVFylUREEuoGULbCrnuuLx417hDzWny+B78Qi67g=="
+        "requested": "[1.5.31, 1.5.31]",
+        "resolved": "1.5.31",
+        "contentHash": "q7G0BHkbhUzpUJiOQNlZZDSMcZEU2/QJBDiSEQAF23wOya4EBaCXS74jAVcEfkHBgOkF413jKZq5vldpjqUfUw=="
       },
       "nanoFramework.System.Diagnostics.Stopwatch": {
         "type": "Direct",
-        "requested": "[1.2.325, 1.2.325]",
-        "resolved": "1.2.325",
-        "contentHash": "VIv7e9pPukInMnHw8lRQGgBWVBccci9htWDM5cQNgYTWgQGkNNJxcXb3YDP7FXhUosRSgI8E7iFRavRczr4SgA=="
+        "requested": "[1.2.418, 1.2.418]",
+        "resolved": "1.2.418",
+        "contentHash": "/DJV6Z1gF290fic5jujbLwzPlPnRiFVlDYO74l6tBcQrL43oX5VIVa09JLn/sBaXJjYL0rNVPYjFl+pO+5vWWQ=="
       },
       "nanoFramework.System.Text": {
         "type": "Direct",
diff --git a/nanoFramework.System.Text.nuspec b/nanoFramework.System.Text.nuspec
index 506252e..1560fa4 100644
--- a/nanoFramework.System.Text.nuspec
+++ b/nanoFramework.System.Text.nuspec
@@ -19,7 +19,7 @@
 This package requires a target with System.Text v$nativeVersion$ (checksum $checksum$).</description>
     <tags>nanoFramework C# csharp netmf netnf nanoFramework.System.Text</tags>
     <dependencies>
-      <dependency id="nanoFramework.CoreLibrary" version="1.14.2" />
+      <dependency id="nanoFramework.CoreLibrary" version="1.15.5" />
     </dependencies>
   </metadata>
   <files>
diff --git a/nanoFramework.System.Text/nanoFramework.System.Text.nfproj b/nanoFramework.System.Text/nanoFramework.System.Text.nfproj
index b223b06..b6b8cb6 100644
--- a/nanoFramework.System.Text/nanoFramework.System.Text.nfproj
+++ b/nanoFramework.System.Text/nanoFramework.System.Text.nfproj
@@ -59,8 +59,8 @@
     <AdditionalFiles Include="..\.sonarlint\nanoframework_lib-nanoframework.system.text\CSharp\SonarLint.xml" Link="SonarLint.xml" />
   </ItemGroup>
   <ItemGroup>
-    <Reference Include="mscorlib, Version=1.14.3.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\packages\nanoFramework.CoreLibrary.1.14.2\lib\mscorlib.dll</HintPath>
+    <Reference Include="mscorlib, Version=1.15.6.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
+      <HintPath>..\packages\nanoFramework.CoreLibrary.1.15.5\lib\mscorlib.dll</HintPath>
       <Private>True</Private>
     </Reference>
   </ItemGroup>
diff --git a/nanoFramework.System.Text/packages.config b/nanoFramework.System.Text/packages.config
index 75b7f06..d60f807 100644
--- a/nanoFramework.System.Text/packages.config
+++ b/nanoFramework.System.Text/packages.config
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="nanoFramework.CoreLibrary" version="1.14.2" targetFramework="netnano1.0" />
+  <package id="nanoFramework.CoreLibrary" version="1.15.5" targetFramework="netnano1.0" />
   <package id="Nerdbank.GitVersioning" version="3.6.133" developmentDependency="true" targetFramework="netnano1.0" />
 </packages>
\ No newline at end of file
diff --git a/nanoFramework.System.Text/packages.lock.json b/nanoFramework.System.Text/packages.lock.json
index b80edcb..33ef693 100644
--- a/nanoFramework.System.Text/packages.lock.json
+++ b/nanoFramework.System.Text/packages.lock.json
@@ -4,9 +4,9 @@
     ".NETnanoFramework,Version=v1.0": {
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+        "requested": "[1.15.5, 1.15.5]",
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       "Nerdbank.GitVersioning": {
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