diff --git a/kfet/forms.py b/kfet/forms.py
index fd2952ec..db2a64c2 100644
--- a/kfet/forms.py
+++ b/kfet/forms.py
@@ -270,4 +270,5 @@ class SettingsForm(forms.ModelForm):
                 raise ValidationError('Renseignez une durée')
             self.cleaned_data['value_decimal'] = None
             self.cleaned_data['value_account'] = None
+        cache.delete(name)
         super(SettingsForm, self).clean()