diff --git a/lib/utils.js b/lib/utils.js
index f0e1964..a38ceff 100644
--- a/lib/utils.js
+++ b/lib/utils.js
@@ -143,7 +143,7 @@ exports.calcDiffImage = async (img1, img2, comparator, {highlightColor, shouldCl
 
     for (let y = 0; y < maxHeight; y++) {
         for (let x = 0; x < maxWidth; x++) {
-            if (y > minHeight || x > minWidth) {
+            if (y >= minHeight || x >= minWidth) {
                 markDiff(x, y); // Out of bounds pixels considered as diff
                 continue;
             }