diff --git a/.github/workflows/server.yml b/.github/workflows/server.yml
index d7886ef3..6f0be3e7 100644
--- a/.github/workflows/server.yml
+++ b/.github/workflows/server.yml
@@ -53,7 +53,7 @@ jobs:
       - name: Setup .NET SDK
         uses: actions/setup-dotnet@v4
         with:
-          dotnet-version: '8.x'
+          dotnet-version: '9.x'
 
       - name: Test
         run: dotnet test -c Release --collect "Code coverage"
diff --git a/server/Directory.Build.props b/server/Directory.Build.props
index e30a15f7..c9e06e41 100644
--- a/server/Directory.Build.props
+++ b/server/Directory.Build.props
@@ -2,7 +2,7 @@
   <!-- There is nothing else to import. -->
 
   <PropertyGroup>
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFramework>net9.0</TargetFramework>
     <LangVersion>latest</LangVersion>
     <Nullable>enable</Nullable>
     <ImplicitUsings>enable</ImplicitUsings>