diff --git a/samples/Samples.Net48/Samples.Net48.csproj b/samples/Samples.Net48/Samples.Net48.csproj
index fca7d126..dcf54f58 100644
--- a/samples/Samples.Net48/Samples.Net48.csproj
+++ b/samples/Samples.Net48/Samples.Net48.csproj
@@ -12,7 +12,7 @@
 
   <ItemGroup>
     <PackageReference Include="GraphQL.NewtonsoftJson" Version="$(GraphQLVersion)" />
-    <PackageReference Include="Microsoft.AspNetCore" Version="2.1.7" />
+    <PackageReference Include="Microsoft.AspNetCore" Version="2.3.9" />
     <PackageReference Include="Microsoft.AspNetCore.CookiePolicy" Version="2.1.14" />
     <PackageReference Include="Microsoft.AspNetCore.HttpsPolicy" Version="2.1.1" />
     <PackageReference Include="Microsoft.AspNetCore.Mvc" Version="2.1.3" />
diff --git a/src/Transports.AspNetCore/Transports.AspNetCore.csproj b/src/Transports.AspNetCore/Transports.AspNetCore.csproj
index 106219b2..f73e7453 100644
--- a/src/Transports.AspNetCore/Transports.AspNetCore.csproj
+++ b/src/Transports.AspNetCore/Transports.AspNetCore.csproj
@@ -17,7 +17,7 @@
   </ItemGroup>
 
   <ItemGroup Condition="'$(TargetFramework)' == 'netstandard2.0' OR '$(TargetFramework)' == 'netcoreapp2.1'">
-    <PackageReference Include="Microsoft.AspNetCore" Version="2.1.7" />
+    <PackageReference Include="Microsoft.AspNetCore" Version="2.3.9" />
     <PackageReference Include="Microsoft.AspNetCore.Authorization" Version="2.1.2" />
     <PackageReference Include="Microsoft.AspNetCore.Mvc" Version="2.1.3" />
     <PackageReference Include="Microsoft.AspNetCore.WebSockets" Version="2.1.7" />
diff --git a/src/Ui.Altair/Ui.Altair.csproj b/src/Ui.Altair/Ui.Altair.csproj
index a4f5c009..1e9737b6 100644
--- a/src/Ui.Altair/Ui.Altair.csproj
+++ b/src/Ui.Altair/Ui.Altair.csproj
@@ -16,7 +16,7 @@
   </ItemGroup>
 
   <ItemGroup Condition="'$(TargetFramework)' == 'netstandard2.0'">
-    <PackageReference Include="Microsoft.AspNetCore" Version="2.1.7" />
+    <PackageReference Include="Microsoft.AspNetCore" Version="2.3.9" />
     <PackageReference Include="Microsoft.AspNetCore.Mvc.Abstractions" Version="2.1.38" />
   </ItemGroup>
 
diff --git a/src/Ui.GraphiQL/Ui.GraphiQL.csproj b/src/Ui.GraphiQL/Ui.GraphiQL.csproj
index 4bc74293..c7dbef70 100644
--- a/src/Ui.GraphiQL/Ui.GraphiQL.csproj
+++ b/src/Ui.GraphiQL/Ui.GraphiQL.csproj
@@ -16,7 +16,7 @@
   </ItemGroup>
 
   <ItemGroup Condition="'$(TargetFramework)' == 'netstandard2.0'">
-    <PackageReference Include="Microsoft.AspNetCore" Version="2.1.7" />
+    <PackageReference Include="Microsoft.AspNetCore" Version="2.3.9" />
     <PackageReference Include="Microsoft.AspNetCore.Mvc.Abstractions" Version="2.1.38" />
   </ItemGroup>
 
diff --git a/src/Ui.Playground/Ui.Playground.csproj b/src/Ui.Playground/Ui.Playground.csproj
index b934cb0a..ec3b9d8e 100644
--- a/src/Ui.Playground/Ui.Playground.csproj
+++ b/src/Ui.Playground/Ui.Playground.csproj
@@ -16,7 +16,7 @@
   </ItemGroup>
 
   <ItemGroup Condition="'$(TargetFramework)' == 'netstandard2.0'">
-    <PackageReference Include="Microsoft.AspNetCore" Version="2.1.7" />
+    <PackageReference Include="Microsoft.AspNetCore" Version="2.3.9" />
     <PackageReference Include="Microsoft.AspNetCore.Mvc.Abstractions" Version="2.1.38" />
   </ItemGroup>
 
diff --git a/src/Ui.Voyager/Ui.Voyager.csproj b/src/Ui.Voyager/Ui.Voyager.csproj
index 0a2f6e6f..eaeb64db 100644
--- a/src/Ui.Voyager/Ui.Voyager.csproj
+++ b/src/Ui.Voyager/Ui.Voyager.csproj
@@ -16,7 +16,7 @@
   </ItemGroup>
 
   <ItemGroup Condition="'$(TargetFramework)' == 'netstandard2.0'">
-    <PackageReference Include="Microsoft.AspNetCore" Version="2.1.7" />
+    <PackageReference Include="Microsoft.AspNetCore" Version="2.3.9" />
     <PackageReference Include="Microsoft.AspNetCore.Mvc.Abstractions" Version="2.1.38" />
   </ItemGroup>