diff --git a/examples/2d_flow_matching.ipynb b/examples/2d_flow_matching.ipynb
index f7ff170..98e0057 100644
--- a/examples/2d_flow_matching.ipynb
+++ b/examples/2d_flow_matching.ipynb
@@ -354,7 +354,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "from torch.distributions.multivariate_normal import MultivariateNormal"
+    "from torch.distributions import Independent, Normal"
    ]
   },
   {
@@ -379,8 +379,8 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "# source distribution is a gaussian\n",
-    "gaussian_log_density = MultivariateNormal(torch.zeros(2, device=device), torch.eye(2, device=device)).log_prob\n",
+    "# source distribution is an isotropic gaussian\n",
+    "gaussian_log_density = Independent(Normal(torch.zeros(2, device=device), torch.ones(2, device=device)), 1).log_prob\n",
     "\n",
     "# compute log likelihood with unbiased hutchinson estimator, average over num_acc\n",
     "num_acc = 10\n",