diff --git a/src/templates/signals/data_visualization_export.html b/src/templates/signals/data_visualization_export.html
index 0122a3c..e5facde 100644
--- a/src/templates/signals/data_visualization_export.html
+++ b/src/templates/signals/data_visualization_export.html
@@ -315,7 +315,7 @@ <h5>Plot / Export data</h5>
                     type: 'GET',
                     data: {
                         'time_type': timeType,
-                        'time_values': `${startDate}-${endDate}`,
+                        'time_values': `${startDate}--${endDate}`,
                         'data_source': dataSource,
                         'signal': dataSignal,
                         'geo_type': geographicType,