diff --git a/Tests/NFUnitTestRegex/NFUnitTestRegex.nfproj b/Tests/NFUnitTestRegex/NFUnitTestRegex.nfproj
index 057976a..81f6dfa 100644
--- a/Tests/NFUnitTestRegex/NFUnitTestRegex.nfproj
+++ b/Tests/NFUnitTestRegex/NFUnitTestRegex.nfproj
@@ -40,7 +40,7 @@
   </ItemGroup>
   <ItemGroup>
     <Reference Include="mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\..\packages\nanoFramework.CoreLibrary.2.0.0-preview.39\lib\netnano1.0\mscorlib.dll</HintPath>
+      <HintPath>..\..\packages\nanoFramework.CoreLibrary.2.0.0-preview.43\lib\netnano1.0\mscorlib.dll</HintPath>
     </Reference>
     <Reference Include="nanoFramework.TestFramework">
       <HintPath>..\..\packages\nanoFramework.TestFramework.4.0.0-preview.47\lib\nanoFramework.TestFramework.dll</HintPath>
diff --git a/Tests/NFUnitTestRegex/packages.config b/Tests/NFUnitTestRegex/packages.config
index 35abca0..8691514 100644
--- a/Tests/NFUnitTestRegex/packages.config
+++ b/Tests/NFUnitTestRegex/packages.config
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="nanoFramework.CoreLibrary" version="2.0.0-preview.39" targetFramework="netnano1.0" />
+  <package id="nanoFramework.CoreLibrary" version="2.0.0-preview.43" targetFramework="netnano1.0" />
   <package id="nanoFramework.TestFramework" version="4.0.0-preview.47" targetFramework="netnano1.0" developmentDependency="true" />
 </packages>
\ No newline at end of file
diff --git a/Tests/NFUnitTestRegex/packages.lock.json b/Tests/NFUnitTestRegex/packages.lock.json
index 0fc2712..5ee00c5 100644
--- a/Tests/NFUnitTestRegex/packages.lock.json
+++ b/Tests/NFUnitTestRegex/packages.lock.json
@@ -4,9 +4,9 @@
     ".NETnanoFramework,Version=v1.0": {
       "nanoFramework.CoreLibrary": {
         "type": "Direct",
-        "requested": "[2.0.0-preview.39, 2.0.0-preview.39]",
-        "resolved": "2.0.0-preview.39",
-        "contentHash": "rkXOwaEq6GIm+dKZ7ICMrG23mln482vRXyDtaNfAeBpgGcgiuFJrbw7w0TTZ2DNhw1CUWlCWZZbXi6+/NHdpLg=="
+        "requested": "[2.0.0-preview.43, 2.0.0-preview.43]",
+        "resolved": "2.0.0-preview.43",
+        "contentHash": "ijOdswxNI+zhN7MrRMjJPe7pAVhqARvpEOFKUKH6D18NUS3CCQ9+IoyVs3zJhmmBk53YmAErFAdCnAWLVxUu8Q=="
       },
       "nanoFramework.TestFramework": {
         "type": "Direct",
diff --git a/nanoFramework.System.Text.RegularExpression.Benchmark/nanoFramework.System.Text.RegularExpression.Benchmark.nfproj b/nanoFramework.System.Text.RegularExpression.Benchmark/nanoFramework.System.Text.RegularExpression.Benchmark.nfproj
index 542a378..46fe4a4 100644
--- a/nanoFramework.System.Text.RegularExpression.Benchmark/nanoFramework.System.Text.RegularExpression.Benchmark.nfproj
+++ b/nanoFramework.System.Text.RegularExpression.Benchmark/nanoFramework.System.Text.RegularExpression.Benchmark.nfproj
@@ -33,7 +33,7 @@
   </ItemGroup>
   <ItemGroup>
     <Reference Include="mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\packages\nanoFramework.CoreLibrary.2.0.0-preview.39\lib\netnano1.0\mscorlib.dll</HintPath>
+      <HintPath>..\packages\nanoFramework.CoreLibrary.2.0.0-preview.43\lib\netnano1.0\mscorlib.dll</HintPath>
     </Reference>
     <Reference Include="nanoFramework.Benchmark, Version=1.0.113.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
       <HintPath>..\packages\nanoFramework.Benchmark.1.0.113\lib\nanoFramework.Benchmark.dll</HintPath>
@@ -45,7 +45,7 @@
       <HintPath>..\packages\nanoFramework.Runtime.Native.2.0.0-preview.22\lib\netnano1.0\nanoFramework.Runtime.Native.dll</HintPath>
     </Reference>
     <Reference Include="nanoFramework.System.Collections, Version=2.0.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\packages\nanoFramework.System.Collections.2.0.0-preview.11\lib\netnano1.0\nanoFramework.System.Collections.dll</HintPath>
+      <HintPath>..\packages\nanoFramework.System.Collections.2.0.0-preview.13\lib\netnano1.0\nanoFramework.System.Collections.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.13\lib\netnano1.0\nanoFramework.System.Text.dll</HintPath>
diff --git a/nanoFramework.System.Text.RegularExpression.Benchmark/packages.config b/nanoFramework.System.Text.RegularExpression.Benchmark/packages.config
index 52e6a1a..1f1650c 100644
--- a/nanoFramework.System.Text.RegularExpression.Benchmark/packages.config
+++ b/nanoFramework.System.Text.RegularExpression.Benchmark/packages.config
@@ -1,10 +1,10 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
   <package id="nanoFramework.Benchmark" version="1.0.113" targetFramework="netnano1.0" />
-  <package id="nanoFramework.CoreLibrary" version="2.0.0-preview.39" targetFramework="netnano1.0" />
+  <package id="nanoFramework.CoreLibrary" version="2.0.0-preview.43" targetFramework="netnano1.0" />
   <package id="nanoFramework.Logging" version="2.0.0-preview.5" targetFramework="netnano1.0" />
   <package id="nanoFramework.Runtime.Native" version="2.0.0-preview.22" targetFramework="netnano1.0" />
-  <package id="nanoFramework.System.Collections" version="2.0.0-preview.11" targetFramework="netnano1.0" />
+  <package id="nanoFramework.System.Collections" version="2.0.0-preview.13" targetFramework="netnano1.0" />
   <package id="nanoFramework.System.Diagnostics.Stopwatch" version="2.0.0-preview.34" targetFramework="netnano1.0" />
   <package id="nanoFramework.System.Text" version="2.0.0-preview.13" targetFramework="netnano1.0" />
 </packages>
\ No newline at end of file
diff --git a/nanoFramework.System.Text.RegularExpression.Benchmark/packages.lock.json b/nanoFramework.System.Text.RegularExpression.Benchmark/packages.lock.json
index 8daa750..238ec1e 100644
--- a/nanoFramework.System.Text.RegularExpression.Benchmark/packages.lock.json
+++ b/nanoFramework.System.Text.RegularExpression.Benchmark/packages.lock.json
@@ -10,9 +10,9 @@
       },
       "nanoFramework.CoreLibrary": {
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-        "requested": "[2.0.0-preview.39, 2.0.0-preview.39]",
-        "resolved": "2.0.0-preview.39",
-        "contentHash": "rkXOwaEq6GIm+dKZ7ICMrG23mln482vRXyDtaNfAeBpgGcgiuFJrbw7w0TTZ2DNhw1CUWlCWZZbXi6+/NHdpLg=="
+        "requested": "[2.0.0-preview.43, 2.0.0-preview.43]",
+        "resolved": "2.0.0-preview.43",
+        "contentHash": "ijOdswxNI+zhN7MrRMjJPe7pAVhqARvpEOFKUKH6D18NUS3CCQ9+IoyVs3zJhmmBk53YmAErFAdCnAWLVxUu8Q=="
       },
       "nanoFramework.Logging": {
         "type": "Direct",
@@ -28,9 +28,9 @@
       },
       "nanoFramework.System.Collections": {
         "type": "Direct",
-        "requested": "[2.0.0-preview.11, 2.0.0-preview.11]",
-        "resolved": "2.0.0-preview.11",
-        "contentHash": "NVpAXchds3s2Y8BSKj1TBeo0D1IF/bGYP4AUBphW8UeOIa1uF2a1tST8pCgv1w2NdgvHcO306rzRP33XNS5YMw=="
+        "requested": "[2.0.0-preview.13, 2.0.0-preview.13]",
+        "resolved": "2.0.0-preview.13",
+        "contentHash": "LEfv51hBTigSimGDszg82kLLL94u4eHkRTiynim43VHvEidquK+JoxIJa+kAxilkkTl+fFA/cMUxUQG7djAxaA=="
       },
       "nanoFramework.System.Diagnostics.Stopwatch": {
         "type": "Direct",
diff --git a/nanoFramework.System.Text.RegularExpressions.nuspec b/nanoFramework.System.Text.RegularExpressions.nuspec
index 0ba1891..60bde78 100644
--- a/nanoFramework.System.Text.RegularExpressions.nuspec
+++ b/nanoFramework.System.Text.RegularExpressions.nuspec
@@ -19,8 +19,8 @@
     <tags>nanoFramework C# csharp netmf netnf regex</tags>
     <dependencies>
       <group targetFramework=".NETnanoFramework1.0">
-        <dependency id="nanoFramework.CoreLibrary" version="2.0.0-preview.39" />
-        <dependency id="nanoFramework.System.Collections" version="2.0.0-preview.11" />
+        <dependency id="nanoFramework.CoreLibrary" version="2.0.0-preview.43" />
+        <dependency id="nanoFramework.System.Collections" version="2.0.0-preview.13" />
         <dependency id="nanoFramework.System.Text" version="2.0.0-preview.13" />
       </group>
     </dependencies>
diff --git a/nanoFramework.System.Text.RegularExpressions/nanoFramework.System.text.RegularExpressions.nfproj b/nanoFramework.System.Text.RegularExpressions/nanoFramework.System.text.RegularExpressions.nfproj
index 3588c03..c7b5add 100644
--- a/nanoFramework.System.Text.RegularExpressions/nanoFramework.System.text.RegularExpressions.nfproj
+++ b/nanoFramework.System.Text.RegularExpressions/nanoFramework.System.text.RegularExpressions.nfproj
@@ -61,10 +61,10 @@
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   <ItemGroup>
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-      <HintPath>..\packages\nanoFramework.CoreLibrary.2.0.0-preview.39\lib\netnano1.0\mscorlib.dll</HintPath>
+      <HintPath>..\packages\nanoFramework.CoreLibrary.2.0.0-preview.43\lib\netnano1.0\mscorlib.dll</HintPath>
     </Reference>
     <Reference Include="nanoFramework.System.Collections, Version=2.0.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\packages\nanoFramework.System.Collections.2.0.0-preview.11\lib\netnano1.0\nanoFramework.System.Collections.dll</HintPath>
+      <HintPath>..\packages\nanoFramework.System.Collections.2.0.0-preview.13\lib\netnano1.0\nanoFramework.System.Collections.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.13\lib\netnano1.0\nanoFramework.System.Text.dll</HintPath>
diff --git a/nanoFramework.System.Text.RegularExpressions/packages.config b/nanoFramework.System.Text.RegularExpressions/packages.config
index 15149f1..ee8bdf3 100644
--- a/nanoFramework.System.Text.RegularExpressions/packages.config
+++ b/nanoFramework.System.Text.RegularExpressions/packages.config
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="nanoFramework.CoreLibrary" version="2.0.0-preview.39" targetFramework="netnano1.0" />
-  <package id="nanoFramework.System.Collections" version="2.0.0-preview.11" targetFramework="netnano1.0" />
+  <package id="nanoFramework.CoreLibrary" version="2.0.0-preview.43" targetFramework="netnano1.0" />
+  <package id="nanoFramework.System.Collections" version="2.0.0-preview.13" targetFramework="netnano1.0" />
   <package id="nanoFramework.System.Text" version="2.0.0-preview.13" targetFramework="netnano1.0" />
   <package id="Nerdbank.GitVersioning" version="3.9.50" developmentDependency="true" targetFramework="netnano1.0" />
 </packages>
\ No newline at end of file
diff --git a/nanoFramework.System.Text.RegularExpressions/packages.lock.json b/nanoFramework.System.Text.RegularExpressions/packages.lock.json
index 652211f..91b5f2b 100644
--- a/nanoFramework.System.Text.RegularExpressions/packages.lock.json
+++ b/nanoFramework.System.Text.RegularExpressions/packages.lock.json
@@ -4,15 +4,15 @@
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+        "requested": "[2.0.0-preview.43, 2.0.0-preview.43]",
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+        "requested": "[2.0.0-preview.13, 2.0.0-preview.13]",
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