diff --git a/source/TestFramework/nanoFramework.TestFramework.nfproj b/source/TestFramework/nanoFramework.TestFramework.nfproj
index 30a7023..033bdb6 100644
--- a/source/TestFramework/nanoFramework.TestFramework.nfproj
+++ b/source/TestFramework/nanoFramework.TestFramework.nfproj
@@ -57,8 +57,8 @@
     <Content Include="packages.lock.json" />
   </ItemGroup>
   <ItemGroup>
-    <Reference Include="mscorlib, Version=1.17.1.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\..\packages\nanoFramework.CoreLibrary.1.17.1\lib\mscorlib.dll</HintPath>
+    <Reference Include="mscorlib, Version=1.17.7.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
+      <HintPath>..\..\packages\nanoFramework.CoreLibrary.1.17.7\lib\mscorlib.dll</HintPath>
     </Reference>
   </ItemGroup>
   <Import Project="..\TestFrameworkShared\TestFrameworkShared.projitems" Label="Shared" />
diff --git a/source/TestFramework/packages.config b/source/TestFramework/packages.config
index a24f447..c8cf398 100644
--- a/source/TestFramework/packages.config
+++ b/source/TestFramework/packages.config
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="nanoFramework.CoreLibrary" version="1.17.1" targetFramework="netnano1.0" />
+  <package id="nanoFramework.CoreLibrary" version="1.17.7" targetFramework="netnano1.0" />
   <package id="Nerdbank.GitVersioning" version="3.7.115" developmentDependency="true" targetFramework="netnano1.0" />
 </packages>
\ No newline at end of file
diff --git a/source/TestFramework/packages.lock.json b/source/TestFramework/packages.lock.json
index 7450bf8..b09ebe2 100644
--- a/source/TestFramework/packages.lock.json
+++ b/source/TestFramework/packages.lock.json
@@ -4,9 +4,9 @@
     ".NETnanoFramework,Version=v1.0": {
       "nanoFramework.CoreLibrary": {
         "type": "Direct",
-        "requested": "[1.17.1, 1.17.1]",
-        "resolved": "1.17.1",
-        "contentHash": "T/iPvP8AeZs/5UeZgVa2cZVbl79ioeRyBJLzx4qvKbE9RE+984AR5WPY4tjGIdXugs1AFUYYnydvuGCpy+P1ww=="
+        "requested": "[1.17.7, 1.17.7]",
+        "resolved": "1.17.7",
+        "contentHash": "LbP1JJXV5g9cSxb4TgWBIFHXtW6fpKHy/FcylOHAn8WAh/smkyWRrwzEj4784QvScNi/b07zn+A5/JpmDvLc1A=="
       },
       "Nerdbank.GitVersioning": {
         "type": "Direct",
diff --git a/source/UnitTestLauncher/nanoFramework.UnitTestLauncher.nfproj b/source/UnitTestLauncher/nanoFramework.UnitTestLauncher.nfproj
index 6e657cc..27add62 100644
--- a/source/UnitTestLauncher/nanoFramework.UnitTestLauncher.nfproj
+++ b/source/UnitTestLauncher/nanoFramework.UnitTestLauncher.nfproj
@@ -40,8 +40,8 @@
     <None Include="key.snk" />
   </ItemGroup>
   <ItemGroup>
-    <Reference Include="mscorlib, Version=1.17.1.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\..\packages\nanoFramework.CoreLibrary.1.17.1\lib\mscorlib.dll</HintPath>
+    <Reference Include="mscorlib, Version=1.17.7.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
+      <HintPath>..\..\packages\nanoFramework.CoreLibrary.1.17.7\lib\mscorlib.dll</HintPath>
     </Reference>
   </ItemGroup>
   <Import Project="$(NanoFrameworkProjectSystemPath)NFProjectSystem.CSharp.targets" Condition="Exists('$(NanoFrameworkProjectSystemPath)NFProjectSystem.CSharp.targets')" />
diff --git a/source/UnitTestLauncher/packages.config b/source/UnitTestLauncher/packages.config
index e084bb1..0abc8c9 100644
--- a/source/UnitTestLauncher/packages.config
+++ b/source/UnitTestLauncher/packages.config
@@ -1,4 +1,4 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="nanoFramework.CoreLibrary" version="1.17.1" targetFramework="netnano1.0" />
-</packages>
+  <package id="nanoFramework.CoreLibrary" version="1.17.7" targetFramework="netnano1.0" />
+</packages>
\ No newline at end of file
diff --git a/source/UnitTestLauncher/packages.lock.json b/source/UnitTestLauncher/packages.lock.json
index 8884966..629cdfd 100644
--- a/source/UnitTestLauncher/packages.lock.json
+++ b/source/UnitTestLauncher/packages.lock.json
@@ -4,9 +4,9 @@
     ".NETnanoFramework,Version=v1.0": {
       "nanoFramework.CoreLibrary": {
         "type": "Direct",
-        "requested": "[1.17.1, 1.17.1]",
-        "resolved": "1.17.1",
-        "contentHash": "T/iPvP8AeZs/5UeZgVa2cZVbl79ioeRyBJLzx4qvKbE9RE+984AR5WPY4tjGIdXugs1AFUYYnydvuGCpy+P1ww=="
+        "requested": "[1.17.7, 1.17.7]",
+        "resolved": "1.17.7",
+        "contentHash": "LbP1JJXV5g9cSxb4TgWBIFHXtW6fpKHy/FcylOHAn8WAh/smkyWRrwzEj4784QvScNi/b07zn+A5/JpmDvLc1A=="
       }
     }
   }