diff --git a/manuels/forms.py b/manuels/forms.py
index 4129da3..e4c95bc 100644
--- a/manuels/forms.py
+++ b/manuels/forms.py
@@ -24,6 +24,7 @@ class EditBookForm(forms.ModelForm):
         self.fields['teacher'].widget.attrs.update({'class': 'custom-select'})
         self.fields['editor'].widget.attrs.update({'class': 'custom-select'})
         self.fields['previously_acquired'].widget.attrs.update({'class': 'custom-select'})
+        self.fields['level'].widget.attrs.update({'class': 'custom-select'})
 
     def clean(self):
         editor = self.cleaned_data['editor']