diff --git a/public/js/crop_editor.js b/public/js/crop_editor.js
index e603210..ddfab11 100644
--- a/public/js/crop_editor.js
+++ b/public/js/crop_editor.js
@@ -255,14 +255,17 @@ class CropEditor {
 
 		let scaleFactor = this.getScaleFactor();
 
-		this.source_x.value = parseInt(this.source_x.value) + Math.ceil((this.dragEndX - this.dragStartX) * scaleFactor);
-		this.source_y.value = parseInt(this.source_y.value) + Math.ceil((this.dragEndY - this.dragStartY) * scaleFactor);
+		let x = parseInt(this.source_x.value) + Math.ceil((this.dragEndX - this.dragStartX) * scaleFactor);
+		if (x + parseInt(this.crop_width.value) > this.original_image.naturalWidth) {
+			x += this.original_image.naturalWidth - (x + parseInt(this.crop_width.value));
+		}
+		this.source_x.value = Math.max(x, 0);
 
-		// let width = Math.ceil(Math.abs(this.dragEndX - this.dragStartX) * scaleFactor);
-		// this.crop_width.value = Math.min(width, this.original_image.naturalWidth - this.source_x.value);
-
-		// let height = Math.ceil(Math.abs(this.dragEndY - this.dragStartY) * scaleFactor);
-		// this.crop_height.value = Math.min(height, this.original_image.naturalHeight - this.source_y.value);
+		let y = parseInt(this.source_y.value) + Math.ceil((this.dragEndY - this.dragStartY) * scaleFactor);
+		if (y + parseInt(this.crop_height.value) > this.original_image.naturalHeight) {
+			y += this.original_image.naturalHeight - (y + parseInt(this.crop_height.value));
+		}
+		this.source_y.value = Math.max(y, 0);
 
 		this.positionBoundary();
 	}