diff --git a/.github/workflows/build-debug.yml b/.github/workflows/build-debug.yml
index 76c0fed..5a7eb3a 100644
--- a/.github/workflows/build-debug.yml
+++ b/.github/workflows/build-debug.yml
@@ -17,8 +17,8 @@ jobs:
       - uses: Cysharp/Actions/.github/actions/setup-dotnet@main
         with:
           dotnet-version: |
-            3.1.x
             6.0.x
+            7.0.x
       - run: dotnet build -c Debug
       - run: dotnet test -c Debug
 
diff --git a/src/UniTask.NetCore/UniTask.NetCore.csproj b/src/UniTask.NetCore/UniTask.NetCore.csproj
index 1f93aa9..94d3a92 100644
--- a/src/UniTask.NetCore/UniTask.NetCore.csproj
+++ b/src/UniTask.NetCore/UniTask.NetCore.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
     <PropertyGroup>
-        <TargetFrameworks>netcoreapp3.1;netstandard2.1;netstandard2.0</TargetFrameworks>
+        <TargetFrameworks>net6.0;net7.0;netstandard2.1;netstandard2.0</TargetFrameworks>
         <AssemblyName>UniTask</AssemblyName>
         <LangVersion>8.0</LangVersion>
         <RootNamespace>Cysharp.Threading.Tasks</RootNamespace>
diff --git a/src/UniTask.NetCoreSandbox/UniTask.NetCoreSandbox.csproj b/src/UniTask.NetCoreSandbox/UniTask.NetCoreSandbox.csproj
index 369f7ee..71b6373 100644
--- a/src/UniTask.NetCoreSandbox/UniTask.NetCoreSandbox.csproj
+++ b/src/UniTask.NetCoreSandbox/UniTask.NetCoreSandbox.csproj
@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>netcoreapp3.1</TargetFramework>
+    <TargetFramework>net7.0</TargetFramework>
     <RootNamespace>NetCoreSandbox</RootNamespace>
     <IsPackable>false</IsPackable>
   </PropertyGroup>
diff --git a/src/UniTask.NetCoreTests/UniTask.NetCoreTests.csproj b/src/UniTask.NetCoreTests/UniTask.NetCoreTests.csproj
index aa0765b..45a2e01 100644
--- a/src/UniTask.NetCoreTests/UniTask.NetCoreTests.csproj
+++ b/src/UniTask.NetCoreTests/UniTask.NetCoreTests.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp3.1</TargetFramework>
+    <TargetFramework>net7.0</TargetFramework>
 
     <IsPackable>false</IsPackable>