diff --git a/packages/@jsii/dotnet-analyzers/src/Amazon.JSII.Analyzers.UnitTests/Amazon.JSII.Analyzers.UnitTests.csproj b/packages/@jsii/dotnet-analyzers/src/Amazon.JSII.Analyzers.UnitTests/Amazon.JSII.Analyzers.UnitTests.csproj
index 426f45e3eb..0d06ffbb13 100644
--- a/packages/@jsii/dotnet-analyzers/src/Amazon.JSII.Analyzers.UnitTests/Amazon.JSII.Analyzers.UnitTests.csproj
+++ b/packages/@jsii/dotnet-analyzers/src/Amazon.JSII.Analyzers.UnitTests/Amazon.JSII.Analyzers.UnitTests.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp3.0</TargetFramework>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
     <IsPackable>false</IsPackable>
     <AssemblyName>Amazon.JSII.Analyzers.UnitTests</AssemblyName>
   </PropertyGroup>
diff --git a/packages/@jsii/dotnet-jsonmodel/src/Amazon.JSII.JsonModel.UnitTests/Amazon.JSII.JsonModel.UnitTests.csproj b/packages/@jsii/dotnet-jsonmodel/src/Amazon.JSII.JsonModel.UnitTests/Amazon.JSII.JsonModel.UnitTests.csproj
index b01cc9e83f..bfa55bf1d6 100644
--- a/packages/@jsii/dotnet-jsonmodel/src/Amazon.JSII.JsonModel.UnitTests/Amazon.JSII.JsonModel.UnitTests.csproj
+++ b/packages/@jsii/dotnet-jsonmodel/src/Amazon.JSII.JsonModel.UnitTests/Amazon.JSII.JsonModel.UnitTests.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp3.0</TargetFramework>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
     <IsPackable>false</IsPackable>
     <AssemblyName>Amazon.JSII.JsonModel.UnitTests</AssemblyName>
     <RootNamespace>Amazon.JSII.JsonModel.UnitTests</RootNamespace>
diff --git a/packages/@jsii/dotnet-jsonmodel/src/Amazon.JSII.JsonModel/Amazon.JSII.JsonModel.csproj b/packages/@jsii/dotnet-jsonmodel/src/Amazon.JSII.JsonModel/Amazon.JSII.JsonModel.csproj
index 6917bcc4ab..8e82179c1a 100644
--- a/packages/@jsii/dotnet-jsonmodel/src/Amazon.JSII.JsonModel/Amazon.JSII.JsonModel.csproj
+++ b/packages/@jsii/dotnet-jsonmodel/src/Amazon.JSII.JsonModel/Amazon.JSII.JsonModel.csproj
@@ -2,7 +2,7 @@
   <Import Project="../NuGet.Metadata.props" />
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp3.0</TargetFramework>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
     <PackageId>Amazon.JSII.JsonModel</PackageId>
     <Title>.NET JsonModel for JSII</Title>
     <PackageIcon>icon.png</PackageIcon>
diff --git a/packages/@jsii/dotnet-runtime-test/test/Amazon.JSII.Runtime.IntegrationTests/Amazon.JSII.Runtime.IntegrationTests.csproj b/packages/@jsii/dotnet-runtime-test/test/Amazon.JSII.Runtime.IntegrationTests/Amazon.JSII.Runtime.IntegrationTests.csproj
index f8b12a9de4..294666587f 100644
--- a/packages/@jsii/dotnet-runtime-test/test/Amazon.JSII.Runtime.IntegrationTests/Amazon.JSII.Runtime.IntegrationTests.csproj
+++ b/packages/@jsii/dotnet-runtime-test/test/Amazon.JSII.Runtime.IntegrationTests/Amazon.JSII.Runtime.IntegrationTests.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
     <PropertyGroup>
-        <TargetFramework>netcoreapp3.0</TargetFramework>
+        <TargetFramework>netcoreapp3.1</TargetFramework>
 
         <IsPackable>false</IsPackable>
     </PropertyGroup>
diff --git a/packages/@jsii/dotnet-runtime-test/test/Amazon.JSII.Runtime.IntegrationTests/ComplianceTests.cs b/packages/@jsii/dotnet-runtime-test/test/Amazon.JSII.Runtime.IntegrationTests/ComplianceTests.cs
index 17a7f10121..1109d2f3b5 100644
--- a/packages/@jsii/dotnet-runtime-test/test/Amazon.JSII.Runtime.IntegrationTests/ComplianceTests.cs
+++ b/packages/@jsii/dotnet-runtime-test/test/Amazon.JSII.Runtime.IntegrationTests/ComplianceTests.cs
@@ -924,7 +924,7 @@ public void OptionalAndVariadicArgumentsTest()
         [Fact(DisplayName = Prefix + nameof(JsiiAgent))]
         public void JsiiAgent()
         {
-            Assert.Equal("DotNet/" + Environment.Version + "/.NETCoreApp,Version=v3.0/1.0.0.0", JsiiAgent_.JsiiAgent);
+            Assert.Equal("DotNet/" + Environment.Version + "/.NETCoreApp,Version=v3.1/1.0.0.0", JsiiAgent_.JsiiAgent);
         }
 
         [Fact(DisplayName = Prefix + nameof(ReceiveInstanceOfPrivateClass))]
diff --git a/packages/@jsii/dotnet-runtime/src/Amazon.JSII.Runtime.UnitTests/Amazon.JSII.Runtime.UnitTests.csproj b/packages/@jsii/dotnet-runtime/src/Amazon.JSII.Runtime.UnitTests/Amazon.JSII.Runtime.UnitTests.csproj
index ffdfbae95c..2763dc88b9 100644
--- a/packages/@jsii/dotnet-runtime/src/Amazon.JSII.Runtime.UnitTests/Amazon.JSII.Runtime.UnitTests.csproj
+++ b/packages/@jsii/dotnet-runtime/src/Amazon.JSII.Runtime.UnitTests/Amazon.JSII.Runtime.UnitTests.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp3.0</TargetFramework>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
 
     <IsPackable>false</IsPackable>
 
diff --git a/packages/@jsii/dotnet-runtime/src/Amazon.JSII.Runtime/Amazon.JSII.Runtime.csproj b/packages/@jsii/dotnet-runtime/src/Amazon.JSII.Runtime/Amazon.JSII.Runtime.csproj
index 0cfd79c8fe..32dff55d07 100644
--- a/packages/@jsii/dotnet-runtime/src/Amazon.JSII.Runtime/Amazon.JSII.Runtime.csproj
+++ b/packages/@jsii/dotnet-runtime/src/Amazon.JSII.Runtime/Amazon.JSII.Runtime.csproj
@@ -2,7 +2,7 @@
   <Import Project="../NuGet.Metadata.props" />
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp3.0</TargetFramework>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
     <PackageId>Amazon.JSII.Runtime</PackageId>
     <Title>.NET Runtime for JSII</Title>
     <PackageIcon>icon.png</PackageIcon>
diff --git a/packages/jsii-pacmak/lib/targets/dotnet.ts b/packages/jsii-pacmak/lib/targets/dotnet.ts
index 1b500ab4ad..c6b76a35e4 100644
--- a/packages/jsii-pacmak/lib/targets/dotnet.ts
+++ b/packages/jsii-pacmak/lib/targets/dotnet.ts
@@ -9,7 +9,7 @@ import { DotNetGenerator } from './dotnet/dotnetgenerator';
 import { TargetBuilder, BuildOptions } from '../builder';
 import { JsiiModule } from '../packaging';
 
-export const TARGET_FRAMEWORK = 'netcoreapp3.0';
+export const TARGET_FRAMEWORK = 'netcoreapp3.1';
 
 /**
  * Build .NET packages all together, by generating an aggregate solution file
diff --git a/packages/jsii-pacmak/test/expected.jsii-calc-base-of-base/dotnet/Amazon.JSII.Tests.CalculatorPackageId.BaseOfBasePackageId/Amazon.JSII.Tests.CalculatorPackageId.BaseOfBasePackageId.csproj b/packages/jsii-pacmak/test/expected.jsii-calc-base-of-base/dotnet/Amazon.JSII.Tests.CalculatorPackageId.BaseOfBasePackageId/Amazon.JSII.Tests.CalculatorPackageId.BaseOfBasePackageId.csproj
index e0f006d3aa..6f9c453990 100644
--- a/packages/jsii-pacmak/test/expected.jsii-calc-base-of-base/dotnet/Amazon.JSII.Tests.CalculatorPackageId.BaseOfBasePackageId/Amazon.JSII.Tests.CalculatorPackageId.BaseOfBasePackageId.csproj
+++ b/packages/jsii-pacmak/test/expected.jsii-calc-base-of-base/dotnet/Amazon.JSII.Tests.CalculatorPackageId.BaseOfBasePackageId/Amazon.JSII.Tests.CalculatorPackageId.BaseOfBasePackageId.csproj
@@ -18,7 +18,7 @@
     <IncludeSymbols>true</IncludeSymbols>
     <IncludeSource>true</IncludeSource>
     <SymbolPackageFormat>snupkg</SymbolPackageFormat>
-    <TargetFramework>netcoreapp3.0</TargetFramework>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
   </PropertyGroup>
   <ItemGroup>
     <EmbeddedResource Include="scope-jsii-calc-base-of-base-0.22.0.tgz" />
diff --git a/packages/jsii-pacmak/test/expected.jsii-calc-base/dotnet/Amazon.JSII.Tests.CalculatorPackageId.BasePackageId/Amazon.JSII.Tests.CalculatorPackageId.BasePackageId.csproj b/packages/jsii-pacmak/test/expected.jsii-calc-base/dotnet/Amazon.JSII.Tests.CalculatorPackageId.BasePackageId/Amazon.JSII.Tests.CalculatorPackageId.BasePackageId.csproj
index 574c1e8295..eb1589d629 100644
--- a/packages/jsii-pacmak/test/expected.jsii-calc-base/dotnet/Amazon.JSII.Tests.CalculatorPackageId.BasePackageId/Amazon.JSII.Tests.CalculatorPackageId.BasePackageId.csproj
+++ b/packages/jsii-pacmak/test/expected.jsii-calc-base/dotnet/Amazon.JSII.Tests.CalculatorPackageId.BasePackageId/Amazon.JSII.Tests.CalculatorPackageId.BasePackageId.csproj
@@ -18,7 +18,7 @@
     <IncludeSymbols>true</IncludeSymbols>
     <IncludeSource>true</IncludeSource>
     <SymbolPackageFormat>snupkg</SymbolPackageFormat>
-    <TargetFramework>netcoreapp3.0</TargetFramework>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
   </PropertyGroup>
   <ItemGroup>
     <EmbeddedResource Include="scope-jsii-calc-base-0.22.0.tgz" />
diff --git a/packages/jsii-pacmak/test/expected.jsii-calc-lib/dotnet/Amazon.JSII.Tests.CalculatorPackageId.LibPackageId/Amazon.JSII.Tests.CalculatorPackageId.LibPackageId.csproj b/packages/jsii-pacmak/test/expected.jsii-calc-lib/dotnet/Amazon.JSII.Tests.CalculatorPackageId.LibPackageId/Amazon.JSII.Tests.CalculatorPackageId.LibPackageId.csproj
index 9c0b9c2a8b..dd99e4f551 100644
--- a/packages/jsii-pacmak/test/expected.jsii-calc-lib/dotnet/Amazon.JSII.Tests.CalculatorPackageId.LibPackageId/Amazon.JSII.Tests.CalculatorPackageId.LibPackageId.csproj
+++ b/packages/jsii-pacmak/test/expected.jsii-calc-lib/dotnet/Amazon.JSII.Tests.CalculatorPackageId.LibPackageId/Amazon.JSII.Tests.CalculatorPackageId.LibPackageId.csproj
@@ -18,7 +18,7 @@
     <IncludeSymbols>true</IncludeSymbols>
     <IncludeSource>true</IncludeSource>
     <SymbolPackageFormat>snupkg</SymbolPackageFormat>
-    <TargetFramework>netcoreapp3.0</TargetFramework>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
   </PropertyGroup>
   <ItemGroup>
     <EmbeddedResource Include="scope-jsii-calc-lib-0.22.0.tgz" />
diff --git a/packages/jsii-pacmak/test/expected.jsii-calc/dotnet/Amazon.JSII.Tests.CalculatorPackageId/Amazon.JSII.Tests.CalculatorPackageId.csproj b/packages/jsii-pacmak/test/expected.jsii-calc/dotnet/Amazon.JSII.Tests.CalculatorPackageId/Amazon.JSII.Tests.CalculatorPackageId.csproj
index a7595f9756..59cc8277b1 100644
--- a/packages/jsii-pacmak/test/expected.jsii-calc/dotnet/Amazon.JSII.Tests.CalculatorPackageId/Amazon.JSII.Tests.CalculatorPackageId.csproj
+++ b/packages/jsii-pacmak/test/expected.jsii-calc/dotnet/Amazon.JSII.Tests.CalculatorPackageId/Amazon.JSII.Tests.CalculatorPackageId.csproj
@@ -20,7 +20,7 @@
     <IncludeSymbols>true</IncludeSymbols>
     <IncludeSource>true</IncludeSource>
     <SymbolPackageFormat>snupkg</SymbolPackageFormat>
-    <TargetFramework>netcoreapp3.0</TargetFramework>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
   </PropertyGroup>
   <ItemGroup>
     <EmbeddedResource Include="jsii-calc-0.22.0.tgz" />