diff --git a/src/newsreader/news/core/forms.py b/src/newsreader/news/core/forms.py
index 8e8059b..a08022a 100644
--- a/src/newsreader/news/core/forms.py
+++ b/src/newsreader/news/core/forms.py
@@ -1,6 +1,7 @@
 from django import forms
 from django.forms.widgets import CheckboxSelectMultiple
 
+from newsreader.accounts.models import User
 from newsreader.news.collection.models import CollectionRule
 from newsreader.news.core.models import Category
 
@@ -23,6 +24,11 @@ class CategoryForm(forms.ModelForm):
         required=False, queryset=CollectionRule.objects.none(), widget=RulesWidget
     )
 
+    user = forms.ModelChoiceField(
+        queryset=User.objects.none(),
+        widget=forms.widgets.HiddenInput(attrs={"readonly": True}),
+    )
+
     def __init__(self, *args, **kwargs):
         self.user = kwargs.pop("user")
 
@@ -31,9 +37,12 @@ class CategoryForm(forms.ModelForm):
         self.fields["rules"].queryset = CollectionRule.objects.filter(user=self.user)
         self.fields["rules"].widget.category = self.instance
 
+        self.fields["user"].queryset = User.objects.filter(pk=self.user.pk)
+
+        self.initial["user"] = self.user
+
     def save(self, commit=True):
         instance = super().save(commit=False)
-        instance.user = self.user
 
         if commit:
             instance.save()
@@ -46,4 +55,4 @@ class CategoryForm(forms.ModelForm):
 
     class Meta:
         model = Category
-        fields = ("name", "rules")
+        fields = ("name", "rules", "user")
diff --git a/src/newsreader/templates/form/form.html b/src/newsreader/templates/form/form.html
index 31242a9..5907df5 100644
--- a/src/newsreader/templates/form/form.html
+++ b/src/newsreader/templates/form/form.html
@@ -12,7 +12,11 @@
   {% endif %}
 
   <section class="section form__section">
-    {% for field in form %}
+    {% for field in form.hidden_fields %}
+      {{ field }}
+    {% endfor %}
+
+    {% for field in form.visible_fields %}
       <fieldset class="fieldset form__fieldset">
         <label class="label form__label" for="{{ field.name }}">
           {{ field.label }}