diff --git a/app/controllers/tasks_controller.rb b/app/controllers/tasks_controller.rb
index 52b5f46..203770d 100644
--- a/app/controllers/tasks_controller.rb
+++ b/app/controllers/tasks_controller.rb
@@ -22,6 +22,16 @@ class TasksController < ApplicationController
     @task.destroy
   end
 
+  def complete
+  @task = @project.tasks.find(params[:id])
+  @task.update(status: "done")
+
+  respond_to do |format|
+    format.turbo_stream
+    format.html { redirect_to @project }
+  end
+end
+
   private
 
   def set_project
diff --git a/app/views/projects/show.html.erb b/app/views/projects/show.html.erb
index 1583b79..123e6c2 100644
--- a/app/views/projects/show.html.erb
+++ b/app/views/projects/show.html.erb
@@ -4,18 +4,23 @@
 <turbo-frame id="tasks">
   <ul id="tasks_list">
     <% @project.tasks.each do |task| %>
-      <li id="<%= dom_id(task) %>">
-        <%= task.title %> (<%= task.status %>)
-        <%= link_to "Destroy", project_task_path(@project, task), data: {
-                        turbo_method: :delete,
-                        turbo_confirm: "Are you sure?"
-                    } %>
-      </li>
+      <turbo-frame id="<%= dom_id(task) %>">
+        <li>
+          <%= task.title %> (<%= task.status %>)
+
+          <%= link_to "Destroy", project_task_path(@project, task), data: { turbo_method: :delete, turbo_confirm: "Are you sure?" } %>
+
+          <% unless task.status == "done" %>
+            <%= button_to "Complete", complete_project_task_path(@project, task), method: :patch, form: { data: { turbo_frame: dom_id(task) } } %>
+          <% end %>
+        </li>
+      </turbo-frame>
     <% end %>
   </ul>
 </turbo-frame>
 
-
 <turbo-frame id="new_task">
+  <br>
+  <h2>Add New Task</h2>
   <%= render partial: "tasks/form", locals: { project: @project, task: Task.new } %>
 </turbo-frame>
\ No newline at end of file
diff --git a/app/views/tasks/_task.html.erb b/app/views/tasks/_task.html.erb
new file mode 100644
index 0000000..77098b5
--- /dev/null
+++ b/app/views/tasks/_task.html.erb
@@ -0,0 +1,16 @@
+<turbo-frame id="<%= dom_id(task) %>">
+  <li>
+    <%= task.title %> (<%= task.status %>)
+
+    <%= link_to "Destroy", project_task_path(task.project, task), data: {
+                    turbo_method: :delete,
+                    turbo_confirm: "Are you sure?"
+                } %>
+
+    <% unless task.status == "completed" %>
+      <%= button_to "Complete", complete_project_task_path(task.project, task),
+                    method: :patch,
+                    form: { data: { turbo_frame: dom_id(task) } } %>
+    <% end %>
+  </li>
+</turbo-frame>
diff --git a/app/views/tasks/complete.turbo_stream.erb b/app/views/tasks/complete.turbo_stream.erb
new file mode 100644
index 0000000..058bf2a
--- /dev/null
+++ b/app/views/tasks/complete.turbo_stream.erb
@@ -0,0 +1,10 @@
+<%= turbo_stream.replace dom_id(@task) do %>
+  <li>
+    <%= @task.title %> (<%= @task.status %>)
+
+    <%= link_to "Destroy", project_task_path(@project, @task), data: {
+                    turbo_method: :delete,
+                    turbo_confirm: "Are you sure?"
+                } %>
+  </li>
+<% end %>
diff --git a/app/views/tasks/create.turbo_stream.erb b/app/views/tasks/create.turbo_stream.erb
index 24cb5e2..f63494f 100644
--- a/app/views/tasks/create.turbo_stream.erb
+++ b/app/views/tasks/create.turbo_stream.erb
@@ -1,11 +1,5 @@
 <%= turbo_stream.append "tasks_list" do %>
-  <li id="<%= dom_id(@task) %>">
-    <%= @task.title %> (<%= @task.status %>)
-    <%= link_to "Destroy", project_task_path(@project, @task), data: {
-                    turbo_method: :delete,
-                    turbo_confirm: "Are you sure?"
-                } %>
-  </li>
+  <%= render partial: "tasks/task", locals: { task: @task } %>
 <% end %>
 
 <%= turbo_stream.replace "new_task" do %>
diff --git a/config/routes.rb b/config/routes.rb
index d7c9dbc..fa9fbf6 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -3,7 +3,11 @@ Rails.application.routes.draw do
   root "projects#index"
   
   resources :projects do 
-    resources :tasks
+    resources :tasks do
+      member do
+        patch :complete
+      end
+    end
   end