diff --git a/src/forum.nim b/src/forum.nim
index 13c095e..bc25b7b 100644
--- a/src/forum.nim
+++ b/src/forum.nim
@@ -791,12 +791,18 @@ routes:
 
   get "/categories.json":
     # TODO: Limit this query in the case of many many categories
-    const categoriesQuery = sql"""select * from category;"""
+    const categoriesQuery =
+      sql"""
+        select c.*, count(thread.category)
+        from category c
+        left join thread on c.id == thread.category
+        group by c.id;
+      """
 
     var list = CategoryList(categories: @[])
     for data in getAllRows(db, categoriesQuery):
       let category = Category(
-        id: data[0].getInt, name: data[1], description: data[2], color: data[3]
+        id: data[0].getInt, name: data[1], description: data[2], color: data[3], numTopics: data[4].parseInt
       )
       list.categories.add(category)
 
diff --git a/src/frontend/category.nim b/src/frontend/category.nim
index b1a68d2..6894127 100644
--- a/src/frontend/category.nim
+++ b/src/frontend/category.nim
@@ -5,6 +5,7 @@ type
     name*: string
     description*: string
     color*: string
+    numTopics*: int
 
   CategoryList* = ref object
     categories*: seq[Category]
diff --git a/src/frontend/categorylist.nim b/src/frontend/categorylist.nim
index 37659c4..d6460a6 100644
--- a/src/frontend/categorylist.nim
+++ b/src/frontend/categorylist.nim
@@ -28,14 +28,14 @@ when defined(js):
       tr(class=class({"no-border": noBorder})):
         td(style=style((StyleAttr.borderLeftColor, kstring("#" & category.color))), class="category"):
           h4(class="category-title"):
-            a(href=makeUri("/c/" & $category.id)):
+            a(href=makeUri("/c/" & $category.id), id="category-" & category.name.slug):
               tdiv():
                 tdiv(class="category-name"):
                   text category.name
           tdiv(class="category-description"):
             text category.description
         td(class="topics"):
-          text "Topics"
+          text $category.numTopics
 
   proc onCategoriesRetrieved(httpStatus: int, response: kstring) =
     state.loading = false