diff --git a/fotos/forms.py b/fotos/forms.py
index 71f55829302a8ee35d011547a73385584047fe05..8ef7ea0483ae7153131bdd3c56e6acd950233e0c 100644
--- a/fotos/forms.py
+++ b/fotos/forms.py
@@ -14,7 +14,7 @@ class UploadedImageForm(forms.ModelForm):
         model = UploadedImage
         fields = [ 'files' ]
         widgets = {
-            'files': ClearableFileInput(attrs = {'multiple': True})
+            'files': ClearableFileInput(attrs = {'allow_multiple_selected': True})
         }
 
 class UploadedFileForm(forms.ModelForm):