diff --git a/Section_2/Stacks, Queues & Heaps.ipynb b/Section_2/Stacks, Queues & Heaps.ipynb
index a54ede2..3e832be 100644
--- a/Section_2/Stacks, Queues & Heaps.ipynb	
+++ b/Section_2/Stacks, Queues & Heaps.ipynb	
@@ -195,7 +195,7 @@
     "    def enqueue(self, item):\n",
     "        self.queue.append(item)\n",
     "        self.size += 1\n",
-    "    def dequeue(self, item):\n",
+    "    def dequeue(self):\n",
     "        if self.size > 0:\n",
     "            self.size -= 1\n",
     "            return self.queue.popleft()\n",