diff --git a/ts/smarttime.classes.extendeddate.ts b/ts/smarttime.classes.extendeddate.ts
index 78163b6..045d3db 100644
--- a/ts/smarttime.classes.extendeddate.ts
+++ b/ts/smarttime.classes.extendeddate.ts
@@ -85,7 +85,7 @@ export class ExtendedDate extends Date {
 
   public exportToHyphedSortableDate() {
     const units = this.exportToUnits();
-    return `${units.yearString}-${units.monthString}.${units.dayString}`;
+    return `${units.yearString}-${units.monthString}-${units.dayString}`;
   }
 
   /**