diff --git a/opentech/apply/stream_forms/blocks.py b/opentech/apply/stream_forms/blocks.py
index 8340e7433d801929dbc5e590294968ce5124725d..1f955a88264208e754ddc60244772edd9d741994 100644
--- a/opentech/apply/stream_forms/blocks.py
+++ b/opentech/apply/stream_forms/blocks.py
@@ -158,6 +158,7 @@ class DatePickerInput(forms.DateInput):
             'data-date-format': 'yyyy-mm-dd',
         })
         kwargs['attrs'] = attrs
+        kwargs['format'] = '%Y-%m-%d'
         super().__init__(*args, **kwargs)