diff --git a/examples/2D_tutorials/Flow_matching_tutorial.ipynb b/examples/2D_tutorials/Flow_matching_tutorial.ipynb
index 99a50ae..50564a0 100644
--- a/examples/2D_tutorials/Flow_matching_tutorial.ipynb
+++ b/examples/2D_tutorials/Flow_matching_tutorial.ipynb
@@ -321,7 +321,7 @@
     "\n",
     "start = time.time()\n",
     "for k in range(20000):\n",
-    "    optximizer.zero_grad()\n",
+    "    optimizer.zero_grad()\n",
     "\n",
     "    x0 = sample_8gaussians(batch_size)\n",
     "    x1 = sample_moons(batch_size)\n",