diff --git a/osu.Game.Rulesets.Mania/UI/ManiaColumnGroup.cs b/osu.Game.Rulesets.Mania/UI/ManiaColumnGroup.cs
index 952deef6e8..1e88b240b5 100644
--- a/osu.Game.Rulesets.Mania/UI/ManiaColumnGroup.cs
+++ b/osu.Game.Rulesets.Mania/UI/ManiaColumnGroup.cs
@@ -49,12 +49,11 @@ namespace osu.Game.Rulesets.Mania.UI
         private readonly Container<DrawableManiaJudgement> judgements;
 
         private readonly Container topLevelContainer;
-        public Container TopLevelContainer => topLevelContainer;
 
         private List<Color4> normalColumnColours = new List<Color4>();
         private Color4 specialColumnColour;
 
-        public int ColumnCount { get; protected set; }
+        public readonly int ColumnCount;
 
         public ManiaColumnGroup(int columnCount)
             : base(Axes.Y)
diff --git a/osu.Game.Rulesets.Mania/UI/ManiaPlayfield.cs b/osu.Game.Rulesets.Mania/UI/ManiaPlayfield.cs
index e9b5b835ef..a5c5979057 100644
--- a/osu.Game.Rulesets.Mania/UI/ManiaPlayfield.cs
+++ b/osu.Game.Rulesets.Mania/UI/ManiaPlayfield.cs
@@ -21,7 +21,7 @@ namespace osu.Game.Rulesets.Mania.UI
         /// <summary>
         /// list mania column group
         /// </summary>
-        private FillFlowContainer<ManiaColumnGroup> listColumnGroup;
+        private readonly FillFlowContainer<ManiaColumnGroup> listColumnGroup;
 
         /// <summary>
         /// Whether this playfield should be inverted. This flips everything inside the playfield.