diff --git a/spine-csharp/src/Posed.cs b/spine-csharp/src/Posed.cs
index cdcc0bdb8..bde8427ab 100644
--- a/spine-csharp/src/Posed.cs
+++ b/spine-csharp/src/Posed.cs
@@ -30,8 +30,7 @@
 using System;
 
 namespace Spine {
-	
-	public interface IPosed {
+	internal interface IPosedInternal {
 		// replaces "object.pose == object.applied" of reference implementation.
 		bool PoseEqualsApplied { get; }
 		// replaces "object.applied = object.pose" of reference implementation.
@@ -40,10 +39,13 @@ namespace Spine {
 		void UseConstrained ();
 		// replaces "object.applied.Set(object.pose)" of reference implementation.
 		void ResetConstrained ();
+	}
+
+	public interface IPosed {
 		void SetupPose ();
 	}
 
-	public class Posed<D, P, A> : IPosed
+	public class Posed<D, P, A> : IPosed, IPosedInternal
 		where D : PosedData<P>
 		where P : IPose<P>
 		where A : P {
@@ -65,19 +67,19 @@ namespace Spine {
 			pose.Set(data.setup);
 		}
 
-		public bool PoseEqualsApplied {
+		bool IPosedInternal.PoseEqualsApplied {
 			get { return (object)pose == (object)applied; }
 		}
 
-		public void UsePose () {
+		void IPosedInternal.UsePose () {
 			applied = pose;
 		}
 
-		public void UseConstrained () {
+		void IPosedInternal.UseConstrained () {
 			applied = constrained;
 		}
 
-		public void ResetConstrained () {
+		void IPosedInternal.ResetConstrained () {
 			applied.Set(pose);
 		}
 
diff --git a/spine-csharp/src/Skeleton.cs b/spine-csharp/src/Skeleton.cs
index 7639b129a..988f4cdad 100644
--- a/spine-csharp/src/Skeleton.cs
+++ b/spine-csharp/src/Skeleton.cs
@@ -46,7 +46,7 @@ namespace Spine {
 		internal ExposedList<IConstraint> constraints;
 		internal ExposedList<PhysicsConstraint> physics;
 		internal ExposedList<object> updateCache = new ExposedList<object>();
-		internal ExposedList<IPosed> resetCache = new ExposedList<IPosed>(16);
+		internal ExposedList<IPosedInternal> resetCache = new ExposedList<IPosedInternal>(16);
 		internal Skin skin;
 		// Color is a struct, set to protected to prevent
 		// Color color = slot.color; color.a = 0.5;
@@ -156,7 +156,7 @@ namespace Spine {
 
 			Slot[] slots = this.slots.Items;
 			for (int i = 0, n = this.slots.Count; i < n; i++) {
-				slots[i].UsePose();
+				((IPosedInternal)slots[i]).UsePose();
 			}
 
 			int boneCount = this.bones.Count;
@@ -165,7 +165,7 @@ namespace Spine {
 				Bone bone = bones[i];
 				bone.sorted = bone.data.skinRequired;
 				bone.active = !bone.sorted;
-				bone.UsePose();
+				((IPosedInternal)bone).UsePose();
 			}
 			if (skin != null) {
 				BoneData[] skinBones = skin.bones.Items;
@@ -183,7 +183,7 @@ namespace Spine {
 			{ // scope added to prevent compile error of n already being declared in enclosing scope
 				int n = this.constraints.Count;
 				for (int i = 0; i < n; i++) {
-					constraints[i].UsePose();
+					((IPosedInternal)constraints[i]).UsePose();
 				}
 				for (int i = 0; i < n; i++) {
 					IConstraint constraint = constraints[i];
@@ -204,7 +204,7 @@ namespace Spine {
 			}
 		}
 
-		internal void Constrained (IPosed obj) {
+		internal void Constrained (IPosedInternal obj) {
 			if (obj.PoseEqualsApplied) { // if (obj.pose == obj.applied) {
 				obj.UseConstrained();
 				resetCache.Add(obj);
@@ -239,7 +239,7 @@ namespace Spine {
 		public void UpdateWorldTransform (Physics physics) {
 			update++;
 
-			IPosed[] resetCache = this.resetCache.Items;
+			IPosedInternal[] resetCache = this.resetCache.Items;
 			for (int i = 0, n = this.resetCache.Count; i < n; i++) {
 				resetCache[i].ResetConstrained();
 			}
diff --git a/spine-csharp/src/Slider.cs b/spine-csharp/src/Slider.cs
index d0aef0142..19ca8dc84 100644
--- a/spine-csharp/src/Slider.cs
+++ b/spine-csharp/src/Slider.cs
@@ -102,10 +102,10 @@ namespace Spine {
 						for (int ii = 0; ii < physicsCount; ii++)
 							skeleton.Constrained(physics[ii]);
 					} else
-						skeleton.Constrained(constraints[timeline.constraintIndex]);
+						skeleton.Constrained((IPosedInternal)constraints[timeline.constraintIndex]);
 				} else if (t as IConstraintTimeline != null) {
 					IConstraintTimeline timeline = (IConstraintTimeline)t;
-					skeleton.Constrained(constraints[timeline.ConstraintIndex]);
+					skeleton.Constrained((IPosedInternal)constraints[timeline.ConstraintIndex]);
 				}
 			}
 		}
diff --git a/spine-csharp/src/package.json b/spine-csharp/src/package.json
index 5ead0a3e2..dcd2fcd5d 100644
--- a/spine-csharp/src/package.json
+++ b/spine-csharp/src/package.json
@@ -2,7 +2,7 @@
 	"name": "com.esotericsoftware.spine.spine-csharp",
 	"displayName": "spine-csharp Runtime",
 	"description": "This plugin provides the spine-csharp core runtime.",
-	"version": "4.3.3",
+	"version": "4.3.4",
 	"unity": "2018.3",
 	"author": {
 		"name": "Esoteric Software",