diff --git a/spine-js/spine.js b/spine-js/spine.js
index 86edad85f..ded11325b 100644
--- a/spine-js/spine.js
+++ b/spine-js/spine.js
@@ -2057,7 +2057,7 @@ spine.SkeletonJson.prototype = {
 				frameIndex++;
 			}
 			timelines.push(timeline);
-			duration = Math.max(duration, timeline.frames[timeline.frameCount * 3 - 3]);
+			duration = Math.max(duration, timeline.frames[timeline.getFrameCount() * 3 - 3]);
 		}
 
 		var ffd = map["ffd"];
@@ -2118,7 +2118,7 @@ spine.SkeletonJson.prototype = {
 						frameIndex++;
 					}
 					timelines[timelines.length] = timeline;
-					duration = Math.max(duration, timeline.frames[timeline.frameCount - 1]);
+					duration = Math.max(duration, timeline.frames[timeline.getFrameCount() - 1]);
 				}
 			}
 		}
@@ -2535,7 +2535,7 @@ spine.SkeletonBounds.prototype = {
 	},
 	aabbCompute: function () {
 		var polygons = this.polygons;
-		var minX = Number.MAX_VALUE, minY = Number.MAX_VALUE, maxX = Number.MIN_VALUE, maxY = Number.MIN_VALUE;
+		var minX = Number.MAX_VALUE, minY = Number.MAX_VALUE, maxX = -Number.MAX_VALUE, maxY = -Number.MAX_VALUE;
 		for (var i = 0, n = polygons.length; i < n; i++) {
 			var vertices = polygons[i];
 			for (var ii = 0, nn = vertices.length; ii < nn; ii += 2) {