diff --git a/.github/workflows/copilot-setup-steps.yml b/.github/workflows/copilot-setup-steps.yml
index 0b747b8c..eb4054de 100644
--- a/.github/workflows/copilot-setup-steps.yml
+++ b/.github/workflows/copilot-setup-steps.yml
@@ -33,5 +33,5 @@ jobs:
         with:
           global-json-file: global.json
           dotnet-version: |
-            9.x
+            10.x
             8.x
diff --git a/.github/workflows/publish-ci.yml b/.github/workflows/publish-ci.yml
index a6b76300..67929fc5 100644
--- a/.github/workflows/publish-ci.yml
+++ b/.github/workflows/publish-ci.yml
@@ -8,7 +8,7 @@ on:
 env:
   DOTNET_SKIP_FIRST_TIME_EXPERIENCE: 1
   DOTNET_NOLOGO: true
-  DOTNET_SDK_VERSION: 9.0.307
+  DOTNET_SDK_VERSION: 10.0.102
 
 jobs:
   publish:
diff --git a/.github/workflows/publish-release.yml b/.github/workflows/publish-release.yml
index 849de8d2..41da40ad 100644
--- a/.github/workflows/publish-release.yml
+++ b/.github/workflows/publish-release.yml
@@ -9,7 +9,7 @@ env:
   DOTNET_SKIP_FIRST_TIME_EXPERIENCE: 1
   DOTNET_NOLOGO: true
   SLEEP_DURATION: 60
-  DOTNET_SDK_VERSION: 9.0.307
+  DOTNET_SDK_VERSION: 10.0.102
 
 jobs:
   publish:
diff --git a/.github/workflows/pull-request.yml b/.github/workflows/pull-request.yml
index 9333d342..95b06426 100644
--- a/.github/workflows/pull-request.yml
+++ b/.github/workflows/pull-request.yml
@@ -21,7 +21,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-22.04, windows-latest, macOS-latest]
-        dotnet: [9.0.307]
+        dotnet: [10.0.102]
     runs-on: ${{ matrix.os }}
 
     steps:
diff --git a/Directory.Build.props b/Directory.Build.props
index 62d2954a..aff702c9 100644
--- a/Directory.Build.props
+++ b/Directory.Build.props
@@ -1,9 +1,9 @@
 <Project>
 
   <PropertyGroup>
-    <DotNetVersion>net8.0</DotNetVersion>
-    <LangVersion>9.0</LangVersion>
-    <FSharpCoreVersion>9.0.*</FSharpCoreVersion>
+    <DotNetVersion>net10.0</DotNetVersion>
+    <LangVersion>10.0</LangVersion>
+    <FSharpCoreVersion>10.0.*</FSharpCoreVersion>
     <AccelerateBuildsInVisualStudio>true</AccelerateBuildsInVisualStudio>
     <DisableImplicitFSharpCoreReference>true</DisableImplicitFSharpCoreReference>
     <NoWarn>$(NoWarn);NU1504;NU1701</NoWarn>
@@ -11,7 +11,7 @@
   </PropertyGroup>
 
   <PropertyGroup Label="NuGet">
-    <Version>3.1.0</Version>
+    <Version>4.0.0</Version>
   </PropertyGroup>
 
 </Project>
diff --git a/RELEASE_NOTES.md b/RELEASE_NOTES.md
index f449ed6d..edcfcec0 100644
--- a/RELEASE_NOTES.md
+++ b/RELEASE_NOTES.md
@@ -238,4 +238,9 @@
 * Added `map` function for Relay `Connection` and `Edge` types
 * Excluded `GraphQLWebSocketMiddleware` from exception stack trace if request not a Web Socket
 * Changed `GraphQLOptionsDefaults.WebSocketConnectionInitTimeoutInMs` const type to `double`
-* Improved Relay XML documentation comments
\ No newline at end of file
+* Improved Relay XML documentation comments
+
+### 4.0.0 - Unreleased
+
+* **Breaking Change** Migrated to .NET 10
+* **Breaking Change** Made Relay `Edge` a struct
\ No newline at end of file
diff --git a/src/FSharp.Data.GraphQL.Server.Relay/Connections.fs b/src/FSharp.Data.GraphQL.Server.Relay/Connections.fs
index 5938b63c..57ad3956 100644
--- a/src/FSharp.Data.GraphQL.Server.Relay/Connections.fs
+++ b/src/FSharp.Data.GraphQL.Server.Relay/Connections.fs
@@ -11,6 +11,7 @@ open FSharp.Data.GraphQL.Types.Patterns
 /// Edges are used to traverse connections in Relay pagination.
 /// </summary>
 /// <typeparam name="Node">The type of the node at the end of this edge.</typeparam>
+[<Struct>]
 type Edge<'Node> = {
     /// <summary>Opaque cursor string used to identify this node's position in the connection.</summary>
     Cursor : string