diff --git a/src/CalcManager/CalcManager.vcxproj b/src/CalcManager/CalcManager.vcxproj
index 487df839..b30b3976 100644
--- a/src/CalcManager/CalcManager.vcxproj
+++ b/src/CalcManager/CalcManager.vcxproj
@@ -45,7 +45,7 @@
     <AppContainerApplication>true</AppContainerApplication>
     <ApplicationType>Windows Store</ApplicationType>
     <ApplicationTypeRevision>10.0</ApplicationTypeRevision>
-    <WindowsTargetPlatformVersion Condition="'$(WindowsTargetPlatformVersion)' == ''">10.0.19019.0</WindowsTargetPlatformVersion>
+    <WindowsTargetPlatformVersion Condition="'$(WindowsTargetPlatformVersion)' == ''">10.0.18362.0</WindowsTargetPlatformVersion>
     <WindowsTargetPlatformMinVersion>10.0.17134.0</WindowsTargetPlatformMinVersion>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
diff --git a/src/CalcViewModel/CalcViewModel.vcxproj b/src/CalcViewModel/CalcViewModel.vcxproj
index 829e600d..df393fd1 100644
--- a/src/CalcViewModel/CalcViewModel.vcxproj
+++ b/src/CalcViewModel/CalcViewModel.vcxproj
@@ -42,7 +42,7 @@
     <MinimumVisualStudioVersion>14.0</MinimumVisualStudioVersion>
     <AppContainerApplication>true</AppContainerApplication>
     <ApplicationType>Windows Store</ApplicationType>
-    <WindowsTargetPlatformVersion>10.0.19019.0</WindowsTargetPlatformVersion>
+    <WindowsTargetPlatformVersion>10.0.18362.0</WindowsTargetPlatformVersion>
     <WindowsTargetPlatformMinVersion>10.0.17134.0</WindowsTargetPlatformMinVersion>
     <ApplicationTypeRevision>10.0</ApplicationTypeRevision>
   </PropertyGroup>
@@ -440,4 +440,4 @@
     </PropertyGroup>
     <Error Condition="!Exists('..\..\packages\Microsoft.UI.Xaml.2.2.190830001\build\native\Microsoft.UI.Xaml.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\packages\Microsoft.UI.Xaml.2.2.190830001\build\native\Microsoft.UI.Xaml.targets'))" />
   </Target>
-</Project>
+</Project>
\ No newline at end of file
diff --git a/src/Calculator/Calculator.vcxproj b/src/Calculator/Calculator.vcxproj
index 6bf2368b..6f54e0d2 100644
--- a/src/Calculator/Calculator.vcxproj
+++ b/src/Calculator/Calculator.vcxproj
@@ -8,7 +8,7 @@
     <MinimumVisualStudioVersion>15.0</MinimumVisualStudioVersion>
     <AppContainerApplication>true</AppContainerApplication>
     <ApplicationType>Windows Store</ApplicationType>
-    <WindowsTargetPlatformVersion Condition="'$(WindowsTargetPlatformVersion)' == ''">10.0.19019.0</WindowsTargetPlatformVersion>
+    <WindowsTargetPlatformVersion Condition="'$(WindowsTargetPlatformVersion)' == ''">10.0.18362.0</WindowsTargetPlatformVersion>
     <WindowsTargetPlatformMinVersion>10.0.17134.0</WindowsTargetPlatformMinVersion>
     <!-- We want to manually control the MinVersion/MaxVersionTested in the manifest so turn of the replacement. -->
     <AppxOSMinVersionReplaceManifestVersion>false</AppxOSMinVersionReplaceManifestVersion>
@@ -879,4 +879,4 @@
     <Error Condition="!Exists('..\..\packages\Microsoft.WindowsCalculator.PGO.1.0.2\build\native\Microsoft.WindowsCalculator.PGO.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\packages\Microsoft.WindowsCalculator.PGO.1.0.2\build\native\Microsoft.WindowsCalculator.PGO.targets'))" />
     <Error Condition="!Exists('..\..\packages\Microsoft.UI.Xaml.2.2.190830001\build\native\Microsoft.UI.Xaml.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\packages\Microsoft.UI.Xaml.2.2.190830001\build\native\Microsoft.UI.Xaml.targets'))" />
   </Target>
-</Project>
+</Project>
\ No newline at end of file
diff --git a/src/Calculator/Controls/MathRichEditBox.cpp b/src/Calculator/Controls/MathRichEditBox.cpp
index 175d7179..a98351db 100644
--- a/src/Calculator/Controls/MathRichEditBox.cpp
+++ b/src/Calculator/Controls/MathRichEditBox.cpp
@@ -16,6 +16,19 @@ using namespace Windows::Foundation::Collections;
 
 DEPENDENCY_PROPERTY_INITIALIZATION(MathRichEditBox, MathText);
 
+// TODO remove when Windows 10 version 2004 SDK is adopted
+namespace Windows_2004_Prerelease
+{
+    constexpr auto RichEditMathMode_MathOnly = 1;
+
+    [uuid("619c20f2-cb3b-4521-981f-2865b1b93f04")] __interface ITextDocument4 : IInspectable
+    {
+        HRESULT SetMath(HSTRING value);
+        HRESULT GetMath(HSTRING * value);
+        HRESULT SetMathMode(int32_t mathMode);
+    };
+}
+
 MathRichEditBox::MathRichEditBox()
 {
     static LimitedAccessFeatureStatus m_lafResultStatus;
@@ -24,17 +37,19 @@ MathRichEditBox::MathRichEditBox()
     if (packageName == L"Microsoft.WindowsCalculator.Dev")
     {
         m_lafResultStatus = LimitedAccessFeatures::TryUnlockFeature(
-            "com.microsoft.windows.richeditmath",
-            "BeDD/jxKhz/yfVNA11t4uA==", // Microsoft.WindowsCalculator.Dev
-            "8wekyb3d8bbwe has registered their use of com.microsoft.windows.richeditmath with Microsoft and agrees to the terms of use.")->Status;
+                                "com.microsoft.windows.richeditmath",
+                                "BeDD/jxKhz/yfVNA11t4uA==", // Microsoft.WindowsCalculator.Dev
+                                "8wekyb3d8bbwe has registered their use of com.microsoft.windows.richeditmath with Microsoft and agrees to the terms of use.")
+                                ->Status;
     }
 
     else if (packageName == L"Microsoft.WindowsCalculator")
     {
         m_lafResultStatus = LimitedAccessFeatures::TryUnlockFeature(
-            "com.microsoft.windows.richeditmath",
-            "pfanNuxnzo+mAkBQ3N/rGQ==", // Microsoft.WindowsCalculator
-            "8wekyb3d8bbwe has registered their use of com.microsoft.windows.richeditmath with Microsoft and agrees to the terms of use.")->Status;
+                                "com.microsoft.windows.richeditmath",
+                                "pfanNuxnzo+mAkBQ3N/rGQ==", // Microsoft.WindowsCalculator
+                                "8wekyb3d8bbwe has registered their use of com.microsoft.windows.richeditmath with Microsoft and agrees to the terms of use.")
+                                ->Status;
     }
 
     else if (packageName == L"Microsoft.WindowsCalculator.Graphing")
@@ -42,17 +57,37 @@ MathRichEditBox::MathRichEditBox()
         m_lafResultStatus = LimitedAccessFeatures::TryUnlockFeature(
                                 "com.microsoft.windows.richeditmath",
                                 "H6wflFFz3gkOsAHtG/D9Tg==", // Microsoft.WindowsCalculator.Graphing
-                                "8wekyb3d8bbwe has registered their use of com.microsoft.windows.richeditmath with Microsoft and agrees to the terms of use.")->Status;
+                                "8wekyb3d8bbwe has registered their use of com.microsoft.windows.richeditmath with Microsoft and agrees to the terms of use.")
+                                ->Status;
     }
 
-    TextDocument->SetMathMode(Windows::UI::Text::RichEditMathMode::MathOnly);
+    // TODO when Windows 10 version 2004 SDK is adopted, replace with:
+    // TextDocument->SetMathMode(Windows::UI::Text::RichEditMathMode::MathOnly);
+    Microsoft::WRL::ComPtr<Windows_2004_Prerelease::ITextDocument4> textDocument4;
+    reinterpret_cast<IInspectable*>(this->TextDocument)->QueryInterface(IID_PPV_ARGS(&textDocument4));
+    auto hr = textDocument4->SetMathMode(Windows_2004_Prerelease::RichEditMathMode_MathOnly);
+    if (FAILED(hr))
+    {
+        throw Exception::CreateException(hr);
+    }
 }
 
 String ^ MathRichEditBox::GetMathTextProperty()
 {
-    String ^ text;
-    this->TextDocument->GetMath(&text);
-    return text;
+    // TODO when Windows 10 version 2004 SDK is adopted, replace with:
+    // String ^ text;
+    // this->TextDocument->GetMath(&text);
+    // return text;
+
+    Microsoft::WRL::ComPtr<Windows_2004_Prerelease::ITextDocument4> textDocument4;
+    reinterpret_cast<IInspectable*>(this->TextDocument)->QueryInterface(IID_PPV_ARGS(&textDocument4));
+    HSTRING math;
+    auto hr = textDocument4->GetMath(&math);
+    if (FAILED(hr))
+    {
+        throw Exception::CreateException(hr);
+    }
+    return reinterpret_cast<String ^>(math);
 }
 
 void MathRichEditBox::SetMathTextProperty(String ^ newValue)
@@ -60,7 +95,15 @@ void MathRichEditBox::SetMathTextProperty(String ^ newValue)
     bool readOnlyState = this->IsReadOnly;
     this->IsReadOnly = false;
 
-    TextDocument->SetMath(newValue);
+    // TODO when Windows 10 version 2004 SDK is adopted, replace with:
+    // TextDocument->SetMath(newValue);
+    Microsoft::WRL::ComPtr<Windows_2004_Prerelease::ITextDocument4> textDocument4;
+    reinterpret_cast<IInspectable*>(this->TextDocument)->QueryInterface(IID_PPV_ARGS(&textDocument4));
+    auto hr = textDocument4->SetMath(reinterpret_cast<HSTRING>(newValue));
+    if (FAILED(hr))
+    {
+        throw Exception::CreateException(hr);
+    }
 
     this->IsReadOnly = readOnlyState;
 }
diff --git a/src/CalculatorUnitTests/CalculatorUnitTests.vcxproj b/src/CalculatorUnitTests/CalculatorUnitTests.vcxproj
index 712309c6..e93899d3 100644
--- a/src/CalculatorUnitTests/CalculatorUnitTests.vcxproj
+++ b/src/CalculatorUnitTests/CalculatorUnitTests.vcxproj
@@ -7,7 +7,7 @@
     <MinimumVisualStudioVersion>15.0</MinimumVisualStudioVersion>
     <AppContainerApplication>true</AppContainerApplication>
     <ApplicationType>Windows Store</ApplicationType>
-    <WindowsTargetPlatformVersion Condition=" '$(WindowsTargetPlatformVersion)' == '' ">10.0.19019.0</WindowsTargetPlatformVersion>
+    <WindowsTargetPlatformVersion Condition=" '$(WindowsTargetPlatformVersion)' == '' ">10.0.18362.0</WindowsTargetPlatformVersion>
     <WindowsTargetPlatformMinVersion>10.0.17134.0</WindowsTargetPlatformMinVersion>
     <ApplicationTypeRevision>10.0</ApplicationTypeRevision>
     <UnitTestPlatformVersion Condition="'$(UnitTestPlatformVersion)' == ''">15.0</UnitTestPlatformVersion>
diff --git a/src/GraphControl/GraphControl.vcxproj b/src/GraphControl/GraphControl.vcxproj
index 1392681c..f07da85a 100644
--- a/src/GraphControl/GraphControl.vcxproj
+++ b/src/GraphControl/GraphControl.vcxproj
@@ -42,7 +42,7 @@
     <MinimumVisualStudioVersion>14.0</MinimumVisualStudioVersion>
     <AppContainerApplication>true</AppContainerApplication>
     <ApplicationType>Windows Store</ApplicationType>
-    <WindowsTargetPlatformVersion Condition="'$(WindowsTargetPlatformVersion)' == ''">10.0.19019.0</WindowsTargetPlatformVersion>
+    <WindowsTargetPlatformVersion Condition="'$(WindowsTargetPlatformVersion)' == ''">10.0.18362.0</WindowsTargetPlatformVersion>
     <WindowsTargetPlatformMinVersion>10.0.17134.0</WindowsTargetPlatformMinVersion>
     <ApplicationTypeRevision>10.0</ApplicationTypeRevision>
   </PropertyGroup>
diff --git a/src/MockGraphingImpl/MockGraphingImpl.vcxproj b/src/MockGraphingImpl/MockGraphingImpl.vcxproj
index 7ab41b15..8c2aad51 100644
--- a/src/MockGraphingImpl/MockGraphingImpl.vcxproj
+++ b/src/MockGraphingImpl/MockGraphingImpl.vcxproj
@@ -42,7 +42,7 @@
     <MinimumVisualStudioVersion>14.0</MinimumVisualStudioVersion>
     <AppContainerApplication>true</AppContainerApplication>
     <ApplicationType>Windows Store</ApplicationType>
-    <WindowsTargetPlatformVersion>10.0.19019.0</WindowsTargetPlatformVersion>
+    <WindowsTargetPlatformVersion>10.0.18362.0</WindowsTargetPlatformVersion>
     <WindowsTargetPlatformMinVersion>10.0.17134.0</WindowsTargetPlatformMinVersion>
     <ApplicationTypeRevision>10.0</ApplicationTypeRevision>
   </PropertyGroup>
@@ -297,4 +297,4 @@
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
   <ImportGroup Label="ExtensionTargets">
   </ImportGroup>
-</Project>
+</Project>
\ No newline at end of file