diff --git a/21g30t1e75.js b/21g30t1e75.js
index 95d930b..64fe641 100644
--- a/21g30t1e75.js
+++ b/21g30t1e75.js
@@ -252,7 +252,7 @@ GameLib.CustomCode.SnakeBody.prototype.advance = function(orientation, flip) {
 	
 	switch (orientation) {
 		case GameLib.CustomCode.ORIENTATION_UP : 
-			if ((this.position.y + 1) > GameLib.CustomCode.GRID_HEIGHT) {
+			if ((this.position.y + 1) >= GameLib.CustomCode.GRID_HEIGHT) {
 				crash = true;
 			} else {
 				this.position.y += 1;
@@ -273,7 +273,7 @@ GameLib.CustomCode.SnakeBody.prototype.advance = function(orientation, flip) {
 			}
 			break;
 		case GameLib.CustomCode.ORIENTATION_RIGHT : 
-			if ((this.position.x + 1) > GameLib.CustomCode.GRID_WIDTH) {
+			if ((this.position.x + 1) >= GameLib.CustomCode.GRID_WIDTH) {
 				crash = true;
 			} else {
 				this.position.x += 1;