diff --git a/extensions/reviewed/MarchingSquares.json b/extensions/reviewed/MarchingSquares.json
index f75dfb6a..8a69bda5 100644
--- a/extensions/reviewed/MarchingSquares.json
+++ b/extensions/reviewed/MarchingSquares.json
@@ -8,7 +8,7 @@
   "name": "MarchingSquares",
   "previewIconUrl": "https://resources.gdevelop-app.com/assets/Icons/peanut-outline.svg",
   "shortDescription": "Allow to build a \"scalar field\" and draw contour lines of it: useful for fog of wars, liquid effects, paint the ground, etc...",
-  "version": "0.5.3",
+  "version": "0.5.4",
   "description": [
     "It can be helpful for:",
     "  * Liquid effects like water, blobs or lava ([open the project online](https://editor.gdevelop.io/?project=example://marching-squares-liquids))",
@@ -353,8 +353,8 @@
             "            var squareY = Math.floor(y);",
             "            if (squareX < 0 ||",
             "                squareY < 0 ||",
-            "                squareX >= this.dimX() ||",
-            "                squareY >= this.dimY()) {",
+            "                squareX >= this.dimX() - 1 ||",
+            "                squareY >= this.dimY() - 1) {",
             "                return 0;",
             "            }",
             "            // Extrapolate",