diff --git a/Game.Blackjack/Components/Card.cs b/Game.Blackjack/Components/Card.cs
index 01aaa6d..3c4bfc4 100644
--- a/Game.Blackjack/Components/Card.cs
+++ b/Game.Blackjack/Components/Card.cs
@@ -7,7 +7,7 @@ namespace Game.Blackjack;
 /// One entity per card.
 /// </summary>
 [MessagePackObject]
-public struct Card
+public record struct Card
 {
     [Key(0)] public Suit Suit;
     [Key(1)] public Rank Rank;
diff --git a/Game.Blackjack/Components/Holds.cs b/Game.Blackjack/Components/Holds.cs
index 46bdf7b..5cad7ea 100644
--- a/Game.Blackjack/Components/Holds.cs
+++ b/Game.Blackjack/Components/Holds.cs
@@ -8,7 +8,7 @@ namespace Game.Blackjack;
 /// representing that the hand holds this card.
 /// </summary>
 [MessagePackObject]
-public struct Holds : IRelationship
+public record struct Holds : IRelationship
 {
     [Key(0)] public Entity Source { get; set; }
     [Key(1)] public Entity Target { get; set; }
diff --git a/Game.Blackjack/Components/InDeck.cs b/Game.Blackjack/Components/InDeck.cs
index b7ae47c..6ea75be 100644
--- a/Game.Blackjack/Components/InDeck.cs
+++ b/Game.Blackjack/Components/InDeck.cs
@@ -8,7 +8,7 @@ namespace Game.Blackjack;
 /// representing that the card is in the deck.
 /// </summary>
 [MessagePackObject]
-public struct InDeck : IRelationship
+public record struct InDeck : IRelationship
 {
     [Key(0)] public Entity Source { get; set; }
     [Key(1)] public Entity Target { get; set; }
diff --git a/Game.Blackjack/Singletons/GameState.cs b/Game.Blackjack/Singletons/GameState.cs
index f14f6e2..64f0d44 100644
--- a/Game.Blackjack/Singletons/GameState.cs
+++ b/Game.Blackjack/Singletons/GameState.cs
@@ -6,7 +6,7 @@ namespace Game.Blackjack;
 /// Global game state stored on the singleton entity.
 /// </summary>
 [MessagePackObject]
-public struct GameState
+public record struct GameState
 {
     [Key(0)] public GamePhase Phase;
     [Key(1)] public RoundResult Result;
diff --git a/Game.TicTacToe/Components/Cell.cs b/Game.TicTacToe/Components/Cell.cs
index 425bec9..e7071ef 100644
--- a/Game.TicTacToe/Components/Cell.cs
+++ b/Game.TicTacToe/Components/Cell.cs
@@ -6,7 +6,7 @@ namespace Game.TicTacToe;
 /// Identifies a board position. One entity per cell.
 /// </summary>
 [MessagePackObject]
-public struct Cell
+public record struct Cell
 {
     [Key(0)] public int Row;
     [Key(1)] public int Col;
diff --git a/Game.TicTacToe/Components/Mark.cs b/Game.TicTacToe/Components/Mark.cs
index b1efbcd..8654808 100644
--- a/Game.TicTacToe/Components/Mark.cs
+++ b/Game.TicTacToe/Components/Mark.cs
@@ -7,7 +7,7 @@ namespace Game.TicTacToe;
 /// Only present on cells that have been claimed.
 /// </summary>
 [MessagePackObject]
-public struct Mark
+public record struct Mark
 {
     [Key(0)] public Player Player;
 }
diff --git a/Game.TicTacToe/Singletons/GameState.cs b/Game.TicTacToe/Singletons/GameState.cs
index 87ba4fc..2a803b0 100644
--- a/Game.TicTacToe/Singletons/GameState.cs
+++ b/Game.TicTacToe/Singletons/GameState.cs
@@ -6,7 +6,7 @@ namespace Game.TicTacToe;
 /// Global game state stored on the singleton entity.
 /// </summary>
 [MessagePackObject]
-public struct GameState
+public record struct GameState
 {
     [Key(0)] public Player CurrentPlayer;
     [Key(1)] public GameStatus Status;