diff --git a/plume-models/src/instance.rs b/plume-models/src/instance.rs
index 0697fae6..331ecca3 100644
--- a/plume-models/src/instance.rs
+++ b/plume-models/src/instance.rs
@@ -68,8 +68,11 @@ impl Instance {
     get!(instances);
     find_by!(instances, find_by_domain, public_domain as String);
 
-    pub fn block(&self) {
-        unimplemented!()
+    pub fn toggle_block(&self, conn: &PgConnection) {
+        diesel::update(self)
+            .set(instances::blocked.eq(!self.blocked))
+            .get_result::<Instance>(conn)
+            .expect("Couldn't block/unblock instance");
     }
 
     pub fn has_admin(&self, conn: &PgConnection) -> bool {
diff --git a/src/main.rs b/src/main.rs
index 8491ebb2..05b5f734 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -65,6 +65,7 @@ fn main() {
             routes::instance::admin,
             routes::instance::admin_instances,
             routes::instance::admin_instances_paginated,
+            routes::instance::toggle_block,
             routes::instance::update_settings,
             routes::instance::shared_inbox,
             routes::instance::nodeinfo,
diff --git a/src/routes/instance.rs b/src/routes/instance.rs
index 1fa6f40b..ff580882 100644
--- a/src/routes/instance.rs
+++ b/src/routes/instance.rs
@@ -154,6 +154,15 @@ fn admin_instances_paginated(admin: Admin, conn: DbConn, page: Page) -> Template
     }))
 }
 
+#[get("/admin/instances/<id>/block")]
+fn toggle_block(admin: Admin, conn: DbConn, id: i32) -> Redirect {
+    if let Some(inst) = Instance::get(&*conn, id) {
+        inst.toggle_block(&*conn);
+    }
+
+    Redirect::to(uri!(admin_instances))
+}
+
 #[post("/inbox", data = "<data>")]
 fn shared_inbox(conn: DbConn, data: String) -> String {
     let act: serde_json::Value = serde_json::from_str(&data[..]).unwrap();
diff --git a/templates/instance/list.html.tera b/templates/instance/list.html.tera
index c534a7df..cabddcdb 100644
--- a/templates/instance/list.html.tera
+++ b/templates/instance/list.html.tera
@@ -17,13 +17,15 @@ Administration of {{ instance.name }}
                     <a href="https://{{ instance.public_domain }}">{{ instance.name }}</a>
                     <small>{{ instance.public_domain }}</small>
                 </p>
-                <a href="/admin/instances/{{ instance.id }}/block">
-                    {% if instance.blocked %}
-                        Unblock
-                    {% else %}
-                        Block
-                    {% endif %}
-                </a>
+                {% if not instance.local %}
+                    <a href="/admin/instances/{{ instance.id }}/block">
+                        {% if instance.blocked %}
+                            Unblock
+                        {% else %}
+                            Block
+                        {% endif %}
+                    </a>
+                {% endif %}
             </div>
         {% endfor %}
     </div>