diff --git a/src/Helldivers-2-Models/ArrowHead/Assignment.cs b/src/Helldivers-2-Models/ArrowHead/Assignment.cs
index 6020e6d..089a948 100644
--- a/src/Helldivers-2-Models/ArrowHead/Assignment.cs
+++ b/src/Helldivers-2-Models/ArrowHead/Assignment.cs
@@ -11,7 +11,7 @@ namespace Helldivers.Models.ArrowHead;
 /// <param name="Setting">Contains detailed information on this assignment like briefing, rewards, ...</param>
 public sealed record Assignment(
     long Id32,
-    List<ulong> Progress,
+    List<long> Progress,
     long ExpiresIn,
     Setting Setting
 );
diff --git a/src/Helldivers-2-Models/V1/Assignment.cs b/src/Helldivers-2-Models/V1/Assignment.cs
index 7c2f1ec..88d9bd7 100644
--- a/src/Helldivers-2-Models/V1/Assignment.cs
+++ b/src/Helldivers-2-Models/V1/Assignment.cs
@@ -18,7 +18,7 @@ namespace Helldivers.Models.V1;
 /// <param name="Expiration">The date when the assignment will expire.</param>
 public sealed record Assignment(
     long Id,
-    List<ulong> Progress,
+    List<long> Progress,
     LocalizedMessage Title,
     LocalizedMessage Briefing,
     LocalizedMessage Description,