diff --git a/frontend/forms.py b/frontend/forms.py
index fc864bc3..0119f560 100644
--- a/frontend/forms.py
+++ b/frontend/forms.py
@@ -184,7 +184,7 @@ class EditionForm(forms.ModelForm):
     
     class Meta:
         model = Edition
-        exclude = 'created', 'work'
+        exclude = ('created', 'work')
         widgets = { 
                 'title': forms.TextInput(attrs={'size': 40}),
                 'add_author': forms.TextInput(attrs={'size': 30}),
@@ -269,7 +269,7 @@ def UserClaimForm ( user_instance, *args, **kwargs ):
         
         class Meta:
             model = Claim
-            exclude = 'status'
+            exclude = ('status',)
             widgets = { 
                     'user': forms.HiddenInput, 
                     'work': forms.HiddenInput, 
diff --git a/libraryauth/backends.py b/libraryauth/backends.py
index 56ab57bf..c1f01c4c 100644
--- a/libraryauth/backends.py
+++ b/libraryauth/backends.py
@@ -47,7 +47,7 @@ class ip:
     class admin_form(forms.ModelForm):
         class Meta:
             model = Block
-            exclude = "library"
+            exclude = ("library",)
 
 class cardnum:   
     def authenticate(self,request, library):
@@ -70,7 +70,7 @@ class cardnum:
     class admin_form(forms.ModelForm):
         class Meta:
             model = CardPattern
-            exclude = "library"
+            exclude = ("library",)
     
     class form(forms.ModelForm):
         credential = forms.RegexField(
@@ -119,4 +119,4 @@ class email:
     class admin_form(forms.ModelForm):
         class Meta:
             model = EmailPattern
-            exclude = "library"
+            exclude = ("library",)