diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index f605c2b52..6d501cc8b 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -40,7 +40,9 @@ jobs:
       - name: Setup .NET SDK
         uses: actions/setup-dotnet@v4.1.0
         with:
-          dotnet-version: 8.0.x
+          dotnet-version: |
+            9.0.x
+            8.0.x
       - name: Build
         run: dotnet build src --configuration Release
       - name: Upload packages
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index db7aef540..f708c4fe8 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -20,7 +20,7 @@ jobs:
       - name: Setup .NET SDK
         uses: actions/setup-dotnet@v4.1.0
         with:
-          dotnet-version: 8.0.x
+          dotnet-version: 9.0.x
       - name: Build
         run: dotnet build src --configuration Release
       - name: Sign NuGet packages
diff --git a/global.json b/global.json
index 2134ed947..d5bf446d0 100644
--- a/global.json
+++ b/global.json
@@ -1,6 +1,6 @@
 {
   "sdk": {
-    "version": "8.0.400",
+    "version": "9.0.100",
     "rollForward": "latestFeature"
   }
 }
\ No newline at end of file
diff --git a/src/CommandLineTests/NServiceBus.Transports.SQS.CommandLine.Tests.csproj b/src/CommandLineTests/NServiceBus.Transports.SQS.CommandLine.Tests.csproj
index badb2adf7..e7324793b 100644
--- a/src/CommandLineTests/NServiceBus.Transports.SQS.CommandLine.Tests.csproj
+++ b/src/CommandLineTests/NServiceBus.Transports.SQS.CommandLine.Tests.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFrameworks>net8.0;net9.0</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/src/NServiceBus.Transport.SQS.AcceptanceTests/NServiceBus.Transport.SQS.AcceptanceTests.csproj b/src/NServiceBus.Transport.SQS.AcceptanceTests/NServiceBus.Transport.SQS.AcceptanceTests.csproj
index bfbcb8ea2..16fd24f17 100644
--- a/src/NServiceBus.Transport.SQS.AcceptanceTests/NServiceBus.Transport.SQS.AcceptanceTests.csproj
+++ b/src/NServiceBus.Transport.SQS.AcceptanceTests/NServiceBus.Transport.SQS.AcceptanceTests.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFrameworks>net8.0;net9.0</TargetFrameworks>
     <SignAssembly>true</SignAssembly>
     <AssemblyOriginatorKeyFile>..\NServiceBusTests.snk</AssemblyOriginatorKeyFile>
     <RootNamespace>NServiceBus.AcceptanceTests</RootNamespace>
diff --git a/src/NServiceBus.Transport.SQS.Tests/NServiceBus.Transport.SQS.Tests.csproj b/src/NServiceBus.Transport.SQS.Tests/NServiceBus.Transport.SQS.Tests.csproj
index 9e1ba47bf..5ab27ee34 100644
--- a/src/NServiceBus.Transport.SQS.Tests/NServiceBus.Transport.SQS.Tests.csproj
+++ b/src/NServiceBus.Transport.SQS.Tests/NServiceBus.Transport.SQS.Tests.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFrameworks>net8.0;net9.0</TargetFrameworks>
     <SignAssembly>true</SignAssembly>
     <AssemblyOriginatorKeyFile>..\NServiceBusTests.snk</AssemblyOriginatorKeyFile>
   </PropertyGroup>
diff --git a/src/NServiceBus.Transport.SQS.TransportTests.DoNotWrapOutgoingMessages/NServiceBus.Transport.SQS.TransportTests.DoNotWrapOutgoingMessages.csproj b/src/NServiceBus.Transport.SQS.TransportTests.DoNotWrapOutgoingMessages/NServiceBus.Transport.SQS.TransportTests.DoNotWrapOutgoingMessages.csproj
index 76b2881ab..6f29dfc59 100644
--- a/src/NServiceBus.Transport.SQS.TransportTests.DoNotWrapOutgoingMessages/NServiceBus.Transport.SQS.TransportTests.DoNotWrapOutgoingMessages.csproj
+++ b/src/NServiceBus.Transport.SQS.TransportTests.DoNotWrapOutgoingMessages/NServiceBus.Transport.SQS.TransportTests.DoNotWrapOutgoingMessages.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <!-- This project can be replaced with a permutation once the core supports it for transport tests https://github.com/Particular/NServiceBus/issues/7231 -->
   <PropertyGroup>
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFrameworks>net8.0;net9.0</TargetFrameworks>
     <SignAssembly>true</SignAssembly>
     <AssemblyOriginatorKeyFile>..\NServiceBusTests.snk</AssemblyOriginatorKeyFile>
     <RootNamespace>TransportTests</RootNamespace>
diff --git a/src/NServiceBus.Transport.SQS.TransportTests/NServiceBus.Transport.SQS.TransportTests.csproj b/src/NServiceBus.Transport.SQS.TransportTests/NServiceBus.Transport.SQS.TransportTests.csproj
index 0385a724d..6566cb3b2 100644
--- a/src/NServiceBus.Transport.SQS.TransportTests/NServiceBus.Transport.SQS.TransportTests.csproj
+++ b/src/NServiceBus.Transport.SQS.TransportTests/NServiceBus.Transport.SQS.TransportTests.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFrameworks>net8.0;net9.0</TargetFrameworks>
     <SignAssembly>true</SignAssembly>
     <AssemblyOriginatorKeyFile>..\NServiceBusTests.snk</AssemblyOriginatorKeyFile>
     <RootNamespace>TransportTests</RootNamespace>