diff --git a/provision/provision-dotnet-sdk.sh b/provision/provision-dotnet-sdk.sh
index 9f395e0..3ef78ee 100644
--- a/provision/provision-dotnet-sdk.sh
+++ b/provision/provision-dotnet-sdk.sh
@@ -1,10 +1,14 @@
 #!/bin/bash
 set -euxo pipefail
 
-# pin the microsoft apt repository above the distro.
+# opt-out of telemetry.
+echo 'export DOTNET_CLI_TELEMETRY_OPTOUT=1' >/etc/profile.d/opt-out-dotnet-cli-telemetry.sh
+source /etc/profile.d/opt-out-dotnet-cli-telemetry.sh
+
+# pin the microsoft apt repository packages above the distro ones.
 # see apt-cache policy
-# see apt-cache policy dotnet-sdk-6.0
-# see apt-cache showpkg dotnet-sdk-6.0
+# see apt-cache policy dotnet-sdk-8.0
+# see apt-cache showpkg dotnet-sdk-8.0
 # see http://manpages.ubuntu.com/manpages/jammy/en/man5/apt_preferences.5.html
 cat >/etc/apt/preferences.d/packages.microsoft.com.pref <<'EOF'
 Package: *
@@ -12,18 +16,14 @@ Pin: origin "packages.microsoft.com"
 Pin-Priority: 999
 EOF
 
-# opt-out of telemetry.
-echo 'export DOTNET_CLI_TELEMETRY_OPTOUT=1' >/etc/profile.d/opt-out-dotnet-cli-telemetry.sh
-source /etc/profile.d/opt-out-dotnet-cli-telemetry.sh
-
 # install the dotnet core sdk.
-# see https://docs.microsoft.com/en-us/dotnet/core/install/linux-ubuntu
+# see https://learn.microsoft.com/en-us/dotnet/core/install/linux-ubuntu
 wget -qO packages-microsoft-prod.deb "https://packages.microsoft.com/config/ubuntu/$(lsb_release -s -r)/packages-microsoft-prod.deb"
 dpkg -i packages-microsoft-prod.deb
 rm packages-microsoft-prod.deb
 apt-get install -y apt-transport-https
 apt-get update
-apt-get install -y dotnet-sdk-6.0
+apt-get install -y dotnet-sdk-8.0
 
 # show versions.
 dotnet --info
diff --git a/provision/use-nuget-repository.sh b/provision/use-nuget-repository.sh
index fcd4f16..5e8ac70 100644
--- a/provision/use-nuget-repository.sh
+++ b/provision/use-nuget-repository.sh
@@ -68,7 +68,7 @@ dotnet nuget list source
 cat >example-hello-world.csproj <<'EOF'
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>net6.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
     <Version>1.0.0</Version>
     <Authors>Alice Doe</Authors>
     <Copyright>Copyleft Alice Doe</Copyright>
@@ -82,7 +82,7 @@ cat >example-hello-world.csproj <<'EOF'
     </NuspecProperties>
   </PropertyGroup>
   <ItemGroup>
-    <PackageReference Include="Serilog" Version="3.0.1" />
+    <PackageReference Include="Serilog" Version="4.3.0" />
   </ItemGroup>
 </Project>
 EOF
@@ -127,7 +127,7 @@ cat >test.csproj <<'EOF'
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>net6.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
   </PropertyGroup>
 </Project>
 EOF
@@ -159,7 +159,7 @@ EOF
 dotnet nuget list source
 dotnet add package example-hello-world
 # see https://www.nuget.org/packages/Serilog.Sinks.Console/
-dotnet add package Serilog.Sinks.Console --version 4.1.0
+dotnet add package Serilog.Sinks.Console --version 6.0.0
 dotnet build -v=n -c=Release
 dotnet publish -v=n -c=Release --no-build --output dist
 ./dist/test