diff --git a/nummi/category/models.py b/nummi/category/models.py
index 845600b..116ba4f 100644
--- a/nummi/category/models.py
+++ b/nummi/category/models.py
@@ -22,10 +22,10 @@ class Category(UserModel):
         return str(self.name)
 
     def get_absolute_url(self):
-        return reverse("category", kwargs={"pk": self.pk})
+        return reverse("category", args=(self.pk,))
 
     def get_delete_url(self):
-        return reverse("del_category", kwargs={"pk": self.pk})
+        return reverse("del_category", args=(self.pk,))
 
     class Meta:
         ordering = ["name"]
diff --git a/nummi/main/templates/main/form/category.html b/nummi/category/templates/category/category_form.html
similarity index 88%
rename from nummi/main/templates/main/form/category.html
rename to nummi/category/templates/category/category_form.html
index 4a7cc62..6223526 100644
--- a/nummi/main/templates/main/form/category.html
+++ b/nummi/category/templates/category/category_form.html
@@ -9,9 +9,11 @@
 {% endblock %}
 {% block h2 %}{{ form.instance.icon|remix }}{{ form.instance }}{% endblock %}
 {% block tables %}
-    {% if form.instance.transactions %}
+    {% if transactions %}
         <h3>{% translate "Transactions" %}</h3>
         {% include "main/table/transaction.html" %}
+    {% endif %}
+    {% if history.data %}
         <h3>{% translate "History" %}</h3>
         {% include "main/plot/history.html" %}
     {% endif %}
diff --git a/nummi/category/urls.py b/nummi/category/urls.py
index 601e925..3d72bca 100644
--- a/nummi/category/urls.py
+++ b/nummi/category/urls.py
@@ -4,18 +4,16 @@ from transaction.views import TransactionMonthView
 from . import views
 
 urlpatterns = [
-    path("category", views.CategoryCreateView.as_view(), name="new_category"),
-    path("category/<pk>", views.CategoryUpdateView.as_view(), name="category"),
+    path("", views.CategoryCreateView.as_view(), name="new_category"),
+    path("<category>", views.CategoryUpdateView.as_view(), name="category"),
     path(
-        "category/<pk>/transactions",
+        "<category>/transactions",
         views.CategoryTListView.as_view(),
         name="category_transactions",
     ),
+    path("<category>/delete", views.CategoryDeleteView.as_view(), name="del_category"),
     path(
-        "category/<pk>/delete", views.CategoryDeleteView.as_view(), name="del_category"
-    ),
-    path(
-        "category/<category>/history/<int:year>/<int:month>",
+        "<category>/history/<int:year>/<int:month>",
         TransactionMonthView.as_view(),
         name="transaction_month",
     ),
diff --git a/nummi/category/views.py b/nummi/category/views.py
index e84ac96..53d8609 100644
--- a/nummi/category/views.py
+++ b/nummi/category/views.py
@@ -1,3 +1,4 @@
+from django.shortcuts import get_object_or_404
 from django.urls import reverse_lazy
 from main.views import NummiCreateView, NummiDeleteView, NummiUpdateView
 from transaction.utils import history
@@ -10,13 +11,12 @@ from .models import Category
 class CategoryCreateView(NummiCreateView):
     model = Category
     form_class = CategoryForm
-    template_name = "main/form/category.html"
 
 
 class CategoryUpdateView(NummiUpdateView):
     model = Category
     form_class = CategoryForm
-    template_name = "main/form/category.html"
+    pk_url_kwarg = "category"
 
     def get_context_data(self, **kwargs):
         data = super().get_context_data(**kwargs)
@@ -33,17 +33,19 @@ class CategoryUpdateView(NummiUpdateView):
 
 class CategoryDeleteView(NummiDeleteView):
     model = Category
+    pk_url_kwarg = "category"
 
 
 class CategoryMixin:
     def get_queryset(self):
-        return super().get_queryset().filter(category=self.kwargs.get("pk"))
+        self.category = get_object_or_404(
+            Category.objects.filter(user=self.request.user),
+            pk=self.kwargs.get("category"),
+        )
+        return super().get_queryset().filter(category=self.category)
 
     def get_context_data(self, **kwargs):
-        return super().get_context_data(**kwargs) | {
-            "object": Category.objects.get(pk=self.kwargs.get("pk")),
-            "category": True,
-        }
+        return super().get_context_data(**kwargs) | {"category": self.category}
 
 
 class CategoryTListView(CategoryMixin, TransactionListView):