diff --git a/spine-unity/Assets/Spine/Editor/spine-unity/Editor/Utility/AssetUtility.cs b/spine-unity/Assets/Spine/Editor/spine-unity/Editor/Utility/AssetUtility.cs
index a9f583af0..98afec85a 100644
--- a/spine-unity/Assets/Spine/Editor/spine-unity/Editor/Utility/AssetUtility.cs
+++ b/spine-unity/Assets/Spine/Editor/spine-unity/Editor/Utility/AssetUtility.cs
@@ -61,6 +61,7 @@ using System.Linq;
 using System.Reflection;
 using System.Text;
 using UnityEditor;
+using UnityEditor.VersionControl;
 using UnityEngine;
 using CompatibilityProblemInfo = Spine.Unity.SkeletonDataCompatibility.CompatibilityProblemInfo;
 
@@ -218,7 +219,7 @@ namespace Spine.Unity.Editor {
 				} else {
 					// On a "Reimport All" the order of imports can be wrong, thus LoadAssetAtPath() above could return null.
 					// as a workaround, we provide a fallback reader.
-					input = File.Open(skeletonDataPath, FileMode.Open, FileAccess.Read);
+					input = File.Open(skeletonDataPath, System.IO.FileMode.Open, FileAccess.Read);
 				}
 				binary.ReadSkeletonData(input);
 			} finally {
@@ -493,6 +494,8 @@ namespace Spine.Unity.Editor {
 					}
 				}
 			}
+
+			RevertUnchangedOnPerforce(atlasPaths, skeletonPaths, newAtlases);
 		}
 
 		static void AddDependentAtlasIfImageChanged (List<string> atlasPaths, List<string> imagePaths) {
@@ -526,6 +529,32 @@ namespace Spine.Unity.Editor {
 			}
 		}
 
+		/// <summary>Prevents automatic check-out of unchanged, identically re-created assets (e.g. when re-imported)
+		/// when using Perforce VCS.</summary>
+		static void RevertUnchangedOnPerforce (List<string> atlasPaths, List<PathAndProblemInfo> skeletonPaths, List<AtlasAssetBase> newAtlases) {
+			Plugin versionControl = Provider.GetActivePlugin();
+			if (versionControl != null && versionControl.name == "Perforce") {
+				AssetList assets = new AssetList();
+
+				foreach (string atlasPath in atlasPaths) {
+					assets.Add(Provider.GetAssetByPath(atlasPath));
+				}
+				foreach (PathAndProblemInfo skeletonPathInfo in skeletonPaths) {
+					if (skeletonPathInfo.compatibilityProblems == null)
+						assets.Add(Provider.GetAssetByPath(skeletonPathInfo.path));
+				}
+				foreach (AtlasAssetBase atlas in newAtlases) {
+					if (atlas != null)
+						assets.Add(Provider.GetAssetByPath(AssetDatabase.GetAssetPath(atlas)));
+					foreach (Material atlasMaterial in atlas.Materials) {
+						if (atlasMaterial != null)
+							assets.Add(Provider.GetAssetByPath(AssetDatabase.GetAssetPath(atlasMaterial)));
+					}
+				}
+				Provider.Revert(assets, RevertMode.Unchanged);
+			}
+		}
+
 		static void ReloadSkeletonData (string skeletonJSONPath, CompatibilityProblemInfo compatibilityProblemInfo) {
 			string dir = Path.GetDirectoryName(skeletonJSONPath).Replace('\\', '/');
 			TextAsset textAsset = AssetDatabase.LoadAssetAtPath<TextAsset>(skeletonJSONPath);
diff --git a/spine-unity/Assets/Spine/package.json b/spine-unity/Assets/Spine/package.json
index a87d36d21..ccfb0254d 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": "4.2.82",
+	"version": "4.2.83",
 	"unity": "2018.3",
 	"author": {
 		"name": "Esoteric Software",