diff --git a/04_mnist_basics.ipynb b/04_mnist_basics.ipynb
index 00562c3..e8b6637 100644
--- a/04_mnist_basics.ipynb
+++ b/04_mnist_basics.ipynb
@@ -3896,6 +3896,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
+    "with torch.no_grad(): weights[0] *= 1.0001"
    ]
   },
   {
diff --git a/13_convolutions.ipynb b/13_convolutions.ipynb
index a3b682a..bf5d08f 100644
--- a/13_convolutions.ipynb
+++ b/13_convolutions.ipynb
@@ -3285,7 +3285,6 @@
     }
    ],
    "source": [
-    "matplotlib.rcParams['image.cmap']='viridis' "
     "learn.activation_stats.color_dim(-2)"
    ]
   },
diff --git a/clean/04_mnist_basics.ipynb b/clean/04_mnist_basics.ipynb
index 88212d5..8147af6 100644
--- a/clean/04_mnist_basics.ipynb
+++ b/clean/04_mnist_basics.ipynb
@@ -956,7 +956,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "corrects = (preds>0.5).float() == train_y\n",
+    "corrects = (preds>0.0).float() == train_y\n",
     "corrects"
    ]
   },