diff --git a/src/lib/turtle/InvManager.hx b/src/lib/turtle/InvManager.hx
index 4fb55c9..84e29ca 100644
--- a/src/lib/turtle/InvManager.hx
+++ b/src/lib/turtle/InvManager.hx
@@ -128,7 +128,7 @@ class InvManager {
 		var topIndex = slots.length - 1;
 
 		for (k => slot in slots) {
-			if (topIndex <= k) {
+			if (topIndex < k) {
 				return;
 			}
 
@@ -138,8 +138,11 @@ class InvManager {
 				return;
 			}
 
-			while (true) {
-				if (topIndex <= k) {
+			var loopProtect = 20;
+
+			while (loopProtect > 0) {
+				loopProtect--;
+				if (topIndex < k) {
 					return;
 				}