diff --git a/RELEASE-NOTES.md b/RELEASE-NOTES.md
index 98785c46ea1..96c33a6dbe2 100644
--- a/RELEASE-NOTES.md
+++ b/RELEASE-NOTES.md
@@ -39,7 +39,7 @@ END TEMPLATE-->
 
 ### New features
 
-*None yet*
+* `RequiredMemberAttribute` and `SetsRequiredMembersAttribute` have been added to the sandbox whitelist. I.e., you can now use the `required` keyword in client/shared code.
 
 ### Bugfixes
 
diff --git a/Robust.Shared/ContentPack/Sandbox.yml b/Robust.Shared/ContentPack/Sandbox.yml
index 37770f25bd5..8916b2db6ab 100644
--- a/Robust.Shared/ContentPack/Sandbox.yml
+++ b/Robust.Shared/ContentPack/Sandbox.yml
@@ -480,6 +480,7 @@ Types:
     NotNullAttribute: { All: True }
     NotNullIfNotNullAttribute: { All: True }
     NotNullWhenAttribute: { All: True }
+    SetsRequiredMembersAttribute: { All : True}
     SuppressMessageAttribute: { All: True }
   System.Diagnostics:
     DebuggableAttribute: { All: True }
@@ -588,7 +589,6 @@ Types:
     Vector2: { All: True }
     Vector3: { All: True }
     Vector4: { All: True }
-    Matrix3x2: { All: True }
   System.Reflection:
     Assembly:
       Methods:
@@ -653,6 +653,7 @@ Types:
     NullableContextAttribute: { All: True }
     PreserveBaseOverridesAttribute: { All: True }
     RefSafetyRulesAttribute: { All: True }
+    RequiredMemberAttribute: { All: True }
     RuntimeCompatibilityAttribute: { All: True }
     RuntimeHelpers: { All: True }
     TaskAwaiter: { All: True }