diff --git a/spine-unity/Assets/Spine/Runtime/spine-unity/Components/SkeletonRenderer.cs b/spine-unity/Assets/Spine/Runtime/spine-unity/Components/SkeletonRenderer.cs
index c41645618..8f9ade241 100644
--- a/spine-unity/Assets/Spine/Runtime/spine-unity/Components/SkeletonRenderer.cs
+++ b/spine-unity/Assets/Spine/Runtime/spine-unity/Components/SkeletonRenderer.cs
@@ -303,7 +303,7 @@ namespace Spine.Unity {
 		[SerializeField] protected Transform physicsMovementRelativeTo = null;
 
 		/// <summary>Used for applying Transform translation to skeleton PhysicsConstraints.</summary>
-		protected Vector2 lastPosition;
+		protected Vector3 lastPosition;
 		/// <summary>Used for applying Transform rotation to skeleton PhysicsConstraints.</summary>
 		protected float lastRotation;
 
@@ -520,8 +520,8 @@ namespace Spine.Unity {
 		public virtual void ApplyTransformMovementToPhysics () {
 			if (Application.isPlaying) {
 				if (physicsPositionInheritanceFactor != Vector2.zero) {
-					Vector2 position = GetPhysicsTransformPosition();
-					Vector2 positionDelta = position - lastPosition;
+					Vector3 position = GetPhysicsTransformPosition();
+					Vector3 positionDelta = position - lastPosition;
 
 					positionDelta = transform.InverseTransformVector(positionDelta);
 					if (physicsMovementRelativeTo != null) {
@@ -541,7 +541,7 @@ namespace Spine.Unity {
 			}
 		}
 
-		protected Vector2 GetPhysicsTransformPosition () {
+		protected Vector3 GetPhysicsTransformPosition () {
 			if (physicsMovementRelativeTo == null) {
 				return transform.position;
 			} else {
diff --git a/spine-unity/Assets/Spine/package.json b/spine-unity/Assets/Spine/package.json
index bfc24e12b..9a49c9912 100644
--- a/spine-unity/Assets/Spine/package.json
+++ b/spine-unity/Assets/Spine/package.json
@@ -2,7 +2,7 @@
 	"name": "com.esotericsoftware.spine.spine-unity",
 	"displayName": "spine-unity Runtime",
 	"description": "This plugin provides the spine-unity runtime core.",
-	"version": "4.2.80",
+	"version": "4.2.81",
 	"unity": "2018.3",
 	"author": {
 		"name": "Esoteric Software",