diff --git a/01_intro.ipynb b/01_intro.ipynb
index ac30dc0..a9663c5 100644
--- a/01_intro.ipynb
+++ b/01_intro.ipynb
@@ -126,7 +126,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "<img alt=\"Natural and artificial neurons\" width=\"500\" caption=\"Natural and artificial neurons\" src=\"images/chapter7_neuron.png\" id=\"neuron\"/>"
+    "<img alt=\"Natural and artificial neurons\" width=\"500\" caption=\"Natural and artificial neurons\" src=\"images/chapter7_neuron.png\" id=\"neuron\" style=\"background-color: white\"/>"
    ]
   },
   {