diff --git a/api/src/engine/connectors/exareme/transformations.ts b/api/src/engine/connectors/exareme/transformations.ts
index ede7dcdd0090fe38e9aab585cfdcac07f91682ad..60f6a78a7b9e9598eb5495e42493787f6c28ae96 100644
--- a/api/src/engine/connectors/exareme/transformations.ts
+++ b/api/src/engine/connectors/exareme/transformations.ts
@@ -180,6 +180,8 @@ dataToHeatmap.registerFunction(
       matrix[elem.y][elem.x] = elem.value;
     });
 
+    matrix.reverse();
+
     return matrix;
   },
   '<a<o>:a<a<n>>',