diff --git a/perf/BenchmarkApp/PerformanceTest.Client/PerformanceTest.Client.csproj b/perf/BenchmarkApp/PerformanceTest.Client/PerformanceTest.Client.csproj
index 25f6a0ba3..8f83591ca 100644
--- a/perf/BenchmarkApp/PerformanceTest.Client/PerformanceTest.Client.csproj
+++ b/perf/BenchmarkApp/PerformanceTest.Client/PerformanceTest.Client.csproj
@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFramework>net9.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
     <DefineConstants>CLIENT;$(DefineConstants)</DefineConstants>
diff --git a/perf/BenchmarkApp/PerformanceTest.Server/PerformanceTest.Server.csproj b/perf/BenchmarkApp/PerformanceTest.Server/PerformanceTest.Server.csproj
index 31505570a..0bb11ff5c 100644
--- a/perf/BenchmarkApp/PerformanceTest.Server/PerformanceTest.Server.csproj
+++ b/perf/BenchmarkApp/PerformanceTest.Server/PerformanceTest.Server.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk.Web">
 
   <PropertyGroup>
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFramework>net9.0</TargetFramework>
     <Nullable>enable</Nullable>
     <ImplicitUsings>enable</ImplicitUsings>
     <DefineConstants>SERVER;$(DefineConstants)</DefineConstants>
diff --git a/perf/BenchmarkApp/PerformanceTest.Shared/PerformanceTest.Shared.csproj b/perf/BenchmarkApp/PerformanceTest.Shared/PerformanceTest.Shared.csproj
index 309fc7d8d..d3d7cc5da 100644
--- a/perf/BenchmarkApp/PerformanceTest.Shared/PerformanceTest.Shared.csproj
+++ b/perf/BenchmarkApp/PerformanceTest.Shared/PerformanceTest.Shared.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFramework>net9.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
   </PropertyGroup>
diff --git a/perf/BenchmarkApp/README.md b/perf/BenchmarkApp/README.md
index 7dc186194..cc2831803 100644
--- a/perf/BenchmarkApp/README.md
+++ b/perf/BenchmarkApp/README.md
@@ -28,5 +28,28 @@ $ dotnet run -c Release -- -u http://localhost:5000 -s unary --report report.txt
 
 #### Use Repository-local MagicOnion.Client (`dotnet` command option)
 ```
-$ dotnet run -c Release -p:UseRepositoryClient=true -- -u http://localhost:5000 -s unary 
-```
\ No newline at end of file
+$ dotnet run -c Release -p:UseRepositoryClient=true -- -u http://localhost:5000 -s unary
+```
+
+## Datadog Event
+
+Post Datadog event if you changed TargetFramework.
+
+```shell
+curl -X POST "https://api.datadoghq.com/api/v1/events" \
+-H "Accept: application/json" \
+-H "Content-Type: application/json" \
+-H "DD-API-KEY: ${DD_API_KEY}" \
+-H "DD-APPLICATION-KEY: ${DD_APP_KEY}" \
+-d @- << EOF
+{
+  "tags": [
+    "type:benchmark",
+    "app:magiconion",
+    "changed:target-framework"
+  ],
+  "title": "magiconion target framework updated",
+  "text": "magiconion target framework version has been updated from 8.0 to 9.0"
+}
+EOF
+```
diff --git a/perf/BenchmarkApp/configs/issue.yaml b/perf/BenchmarkApp/configs/issue.yaml
index 078d595a0..18edafc3f 100644
--- a/perf/BenchmarkApp/configs/issue.yaml
+++ b/perf/BenchmarkApp/configs/issue.yaml
@@ -1,7 +1,7 @@
 # template: https://github.com/Cysharp/Actions/tree/main/.github/scripts/_template_benchmark_config.yaml
 # config2args script: https://github.com/Cysharp/Actions/tree/main/.github/scripts/benchmark_config2args.sh
 apt-tools: ""
-dotnet-version: 8.0
+dotnet-version: 9.0
 benchmark-expire-min: 15
 benchmark-location: "japaneast"
 benchmark-timeout-min: 10
diff --git a/perf/BenchmarkApp/configs/schedule_ci.yaml b/perf/BenchmarkApp/configs/schedule_ci.yaml
index 88220be96..a06a05940 100644
--- a/perf/BenchmarkApp/configs/schedule_ci.yaml
+++ b/perf/BenchmarkApp/configs/schedule_ci.yaml
@@ -1,7 +1,7 @@
 # template: https://github.com/Cysharp/Actions/tree/main/.github/scripts/_template_benchmark_config.yaml
 # config2args script: https://github.com/Cysharp/Actions/tree/main/.github/scripts/benchmark_config2args.sh
 apt-tools: "libmsquic"
-dotnet-version: 8.0
+dotnet-version: 9.0
 benchmark-expire-min: 15
 #benchmark-location: "japaneast"
 benchmark-location: "eastus"
diff --git a/perf/BenchmarkApp/configs/schedule_serverstreaming.yaml b/perf/BenchmarkApp/configs/schedule_serverstreaming.yaml
index a3d28d8b9..7b2f1e7b9 100644
--- a/perf/BenchmarkApp/configs/schedule_serverstreaming.yaml
+++ b/perf/BenchmarkApp/configs/schedule_serverstreaming.yaml
@@ -1,7 +1,7 @@
 # template: https://github.com/Cysharp/Actions/tree/main/.github/scripts/_template_benchmark_config.yaml
 # config2args script: https://github.com/Cysharp/Actions/tree/main/.github/scripts/benchmark_config2args.sh
 apt-tools: "libmsquic"
-dotnet-version: 8.0
+dotnet-version: 9.0
 benchmark-expire-min: 15
 #benchmark-location: "japaneast"
 benchmark-location: "eastus"
diff --git a/perf/BenchmarkApp/configs/workflow_dispatch_memorypack_h2.yaml b/perf/BenchmarkApp/configs/workflow_dispatch_memorypack_h2.yaml
index b4be02628..5a8ed4c5a 100644
--- a/perf/BenchmarkApp/configs/workflow_dispatch_memorypack_h2.yaml
+++ b/perf/BenchmarkApp/configs/workflow_dispatch_memorypack_h2.yaml
@@ -1,7 +1,7 @@
 # template: https://github.com/Cysharp/Actions/tree/main/.github/scripts/_template_benchmark_config.yaml
 # config2args script: https://github.com/Cysharp/Actions/tree/main/.github/scripts/benchmark_config2args.sh
 apt-tools: ""
-dotnet-version: 8.0
+dotnet-version: 9.0
 benchmark-expire-min: 15
 benchmark-location: "japaneast"
 benchmark-timeout-min: 10
diff --git a/perf/BenchmarkApp/configs/workflow_dispatch_memorypack_h2c.yaml b/perf/BenchmarkApp/configs/workflow_dispatch_memorypack_h2c.yaml
index a1e5fea0f..5729320b9 100644
--- a/perf/BenchmarkApp/configs/workflow_dispatch_memorypack_h2c.yaml
+++ b/perf/BenchmarkApp/configs/workflow_dispatch_memorypack_h2c.yaml
@@ -1,7 +1,7 @@
 # template: https://github.com/Cysharp/Actions/tree/main/.github/scripts/_template_benchmark_config.yaml
 # config2args script: https://github.com/Cysharp/Actions/tree/main/.github/scripts/benchmark_config2args.sh
 apt-tools: ""
-dotnet-version: 8.0
+dotnet-version: 9.0
 benchmark-expire-min: 15
 benchmark-location: "japaneast"
 benchmark-timeout-min: 10
diff --git a/perf/BenchmarkApp/configs/workflow_dispatch_memorypack_h3.yaml b/perf/BenchmarkApp/configs/workflow_dispatch_memorypack_h3.yaml
index f911c2b3d..376d493a2 100644
--- a/perf/BenchmarkApp/configs/workflow_dispatch_memorypack_h3.yaml
+++ b/perf/BenchmarkApp/configs/workflow_dispatch_memorypack_h3.yaml
@@ -1,7 +1,7 @@
 # template: https://github.com/Cysharp/Actions/tree/main/.github/scripts/_template_benchmark_config.yaml
 # config2args script: https://github.com/Cysharp/Actions/tree/main/.github/scripts/benchmark_config2args.sh
 apt-tools: "libmsquic"
-dotnet-version: 8.0
+dotnet-version: 9.0
 benchmark-expire-min: 15
 benchmark-location: "japaneast"
 benchmark-timeout-min: 10
diff --git a/perf/BenchmarkApp/configs/workflow_dispatch_messagepack_h2.yaml b/perf/BenchmarkApp/configs/workflow_dispatch_messagepack_h2.yaml
index 95bfd8632..fe0c04e60 100644
--- a/perf/BenchmarkApp/configs/workflow_dispatch_messagepack_h2.yaml
+++ b/perf/BenchmarkApp/configs/workflow_dispatch_messagepack_h2.yaml
@@ -1,7 +1,7 @@
 # template: https://github.com/Cysharp/Actions/tree/main/.github/scripts/_template_benchmark_config.yaml
 # config2args script: https://github.com/Cysharp/Actions/tree/main/.github/scripts/benchmark_config2args.sh
 apt-tools: ""
-dotnet-version: 8.0
+dotnet-version: 9.0
 benchmark-expire-min: 15
 benchmark-location: "japaneast"
 benchmark-timeout-min: 10
diff --git a/perf/BenchmarkApp/configs/workflow_dispatch_messagepack_h2_nugetclient.yaml b/perf/BenchmarkApp/configs/workflow_dispatch_messagepack_h2_nugetclient.yaml
index 033ef4d4f..703eaaee5 100644
--- a/perf/BenchmarkApp/configs/workflow_dispatch_messagepack_h2_nugetclient.yaml
+++ b/perf/BenchmarkApp/configs/workflow_dispatch_messagepack_h2_nugetclient.yaml
@@ -1,7 +1,7 @@
 # template: https://github.com/Cysharp/Actions/tree/main/.github/scripts/_template_benchmark_config.yaml
 # config2args script: https://github.com/Cysharp/Actions/tree/main/.github/scripts/benchmark_config2args.sh
 apt-tools: ""
-dotnet-version: 8.0
+dotnet-version: 9.0
 benchmark-expire-min: 15
 benchmark-location: "japaneast"
 benchmark-timeout-min: 10
diff --git a/perf/BenchmarkApp/configs/workflow_dispatch_messagepack_h2_nugetserver.yaml b/perf/BenchmarkApp/configs/workflow_dispatch_messagepack_h2_nugetserver.yaml
index 0c419a7a0..d19046235 100644
--- a/perf/BenchmarkApp/configs/workflow_dispatch_messagepack_h2_nugetserver.yaml
+++ b/perf/BenchmarkApp/configs/workflow_dispatch_messagepack_h2_nugetserver.yaml
@@ -1,7 +1,7 @@
 # template: https://github.com/Cysharp/Actions/tree/main/.github/scripts/_template_benchmark_config.yaml
 # config2args script: https://github.com/Cysharp/Actions/tree/main/.github/scripts/benchmark_config2args.sh
 apt-tools: ""
-dotnet-version: 8.0
+dotnet-version: 9.0
 benchmark-expire-min: 15
 benchmark-location: "japaneast"
 benchmark-timeout-min: 10
diff --git a/perf/BenchmarkApp/configs/workflow_dispatch_messagepack_h2c.yaml b/perf/BenchmarkApp/configs/workflow_dispatch_messagepack_h2c.yaml
index 1dec6a9d5..7f676ea5f 100644
--- a/perf/BenchmarkApp/configs/workflow_dispatch_messagepack_h2c.yaml
+++ b/perf/BenchmarkApp/configs/workflow_dispatch_messagepack_h2c.yaml
@@ -1,7 +1,7 @@
 # template: https://github.com/Cysharp/Actions/tree/main/.github/scripts/_template_benchmark_config.yaml
 # config2args script: https://github.com/Cysharp/Actions/tree/main/.github/scripts/benchmark_config2args.sh
 apt-tools: ""
-dotnet-version: 8.0
+dotnet-version: 9.0
 benchmark-expire-min: 15
 benchmark-location: "japaneast"
 benchmark-timeout-min: 10
diff --git a/perf/BenchmarkApp/configs/workflow_dispatch_messagepack_h2c_eastus.yaml b/perf/BenchmarkApp/configs/workflow_dispatch_messagepack_h2c_eastus.yaml
index 5cc324611..5013850f1 100644
--- a/perf/BenchmarkApp/configs/workflow_dispatch_messagepack_h2c_eastus.yaml
+++ b/perf/BenchmarkApp/configs/workflow_dispatch_messagepack_h2c_eastus.yaml
@@ -1,7 +1,7 @@
 # template: https://github.com/Cysharp/Actions/tree/main/.github/scripts/_template_benchmark_config.yaml
 # config2args script: https://github.com/Cysharp/Actions/tree/main/.github/scripts/benchmark_config2args.sh
 apt-tools: ""
-dotnet-version: 8.0
+dotnet-version: 9.0
 benchmark-expire-min: 15
 benchmark-location: "eastus"
 benchmark-timeout-min: 10
diff --git a/perf/BenchmarkApp/configs/workflow_dispatch_messagepack_h2c_nugetclient.yaml b/perf/BenchmarkApp/configs/workflow_dispatch_messagepack_h2c_nugetclient.yaml
index 1bfe846dc..7f2260ff4 100644
--- a/perf/BenchmarkApp/configs/workflow_dispatch_messagepack_h2c_nugetclient.yaml
+++ b/perf/BenchmarkApp/configs/workflow_dispatch_messagepack_h2c_nugetclient.yaml
@@ -1,7 +1,7 @@
 # template: https://github.com/Cysharp/Actions/tree/main/.github/scripts/_template_benchmark_config.yaml
 # config2args script: https://github.com/Cysharp/Actions/tree/main/.github/scripts/benchmark_config2args.sh
 apt-tools: ""
-dotnet-version: 8.0
+dotnet-version: 9.0
 benchmark-expire-min: 15
 benchmark-location: "japaneast"
 benchmark-timeout-min: 10
diff --git a/perf/BenchmarkApp/configs/workflow_dispatch_messagepack_h2c_nugetserver.yaml b/perf/BenchmarkApp/configs/workflow_dispatch_messagepack_h2c_nugetserver.yaml
index ec5c06928..021ff3256 100644
--- a/perf/BenchmarkApp/configs/workflow_dispatch_messagepack_h2c_nugetserver.yaml
+++ b/perf/BenchmarkApp/configs/workflow_dispatch_messagepack_h2c_nugetserver.yaml
@@ -1,7 +1,7 @@
 # template: https://github.com/Cysharp/Actions/tree/main/.github/scripts/_template_benchmark_config.yaml
 # config2args script: https://github.com/Cysharp/Actions/tree/main/.github/scripts/benchmark_config2args.sh
 apt-tools: ""
-dotnet-version: 8.0
+dotnet-version: 9.0
 benchmark-expire-min: 15
 benchmark-location: "japaneast"
 benchmark-timeout-min: 10
diff --git a/perf/BenchmarkApp/configs/workflow_dispatch_messagepack_h2c_serverstreaming.yaml b/perf/BenchmarkApp/configs/workflow_dispatch_messagepack_h2c_serverstreaming.yaml
index 3d4f09e72..d36c79c60 100644
--- a/perf/BenchmarkApp/configs/workflow_dispatch_messagepack_h2c_serverstreaming.yaml
+++ b/perf/BenchmarkApp/configs/workflow_dispatch_messagepack_h2c_serverstreaming.yaml
@@ -1,7 +1,7 @@
 # template: https://github.com/Cysharp/Actions/tree/main/.github/scripts/_template_benchmark_config.yaml
 # config2args script: https://github.com/Cysharp/Actions/tree/main/.github/scripts/benchmark_config2args.sh
 apt-tools: ""
-dotnet-version: 8.0
+dotnet-version: 9.0
 benchmark-expire-min: 15
 benchmark-location: "japaneast"
 benchmark-timeout-min: 10
diff --git a/perf/BenchmarkApp/configs/workflow_dispatch_messagepack_h3.yaml b/perf/BenchmarkApp/configs/workflow_dispatch_messagepack_h3.yaml
index b50bfcbc0..1d1244c49 100644
--- a/perf/BenchmarkApp/configs/workflow_dispatch_messagepack_h3.yaml
+++ b/perf/BenchmarkApp/configs/workflow_dispatch_messagepack_h3.yaml
@@ -1,7 +1,7 @@
 # template: https://github.com/Cysharp/Actions/tree/main/.github/scripts/_template_benchmark_config.yaml
 # config2args script: https://github.com/Cysharp/Actions/tree/main/.github/scripts/benchmark_config2args.sh
 apt-tools: "libmsquic"
-dotnet-version: 8.0
+dotnet-version: 9.0
 benchmark-expire-min: 15
 benchmark-location: "japaneast"
 benchmark-timeout-min: 10
diff --git a/perf/BenchmarkApp/configs/workflow_dispatch_messagepack_h3_nugetclient.yaml b/perf/BenchmarkApp/configs/workflow_dispatch_messagepack_h3_nugetclient.yaml
index 17d277166..b4dbb3251 100644
--- a/perf/BenchmarkApp/configs/workflow_dispatch_messagepack_h3_nugetclient.yaml
+++ b/perf/BenchmarkApp/configs/workflow_dispatch_messagepack_h3_nugetclient.yaml
@@ -1,7 +1,7 @@
 # template: https://github.com/Cysharp/Actions/tree/main/.github/scripts/_template_benchmark_config.yaml
 # config2args script: https://github.com/Cysharp/Actions/tree/main/.github/scripts/benchmark_config2args.sh
 apt-tools: ""
-dotnet-version: 8.0
+dotnet-version: 9.0
 benchmark-expire-min: 15
 benchmark-location: "japaneast"
 benchmark-timeout-min: 10
diff --git a/perf/BenchmarkApp/configs/workflow_dispatch_messagepack_h3_nugetserver.yaml b/perf/BenchmarkApp/configs/workflow_dispatch_messagepack_h3_nugetserver.yaml
index 289cdec04..e6b25a9e9 100644
--- a/perf/BenchmarkApp/configs/workflow_dispatch_messagepack_h3_nugetserver.yaml
+++ b/perf/BenchmarkApp/configs/workflow_dispatch_messagepack_h3_nugetserver.yaml
@@ -1,7 +1,7 @@
 # template: https://github.com/Cysharp/Actions/tree/main/.github/scripts/_template_benchmark_config.yaml
 # config2args script: https://github.com/Cysharp/Actions/tree/main/.github/scripts/benchmark_config2args.sh
 apt-tools: ""
-dotnet-version: 8.0
+dotnet-version: 9.0
 benchmark-expire-min: 15
 benchmark-location: "japaneast"
 benchmark-timeout-min: 10