diff --git a/01-Variables.ipynb b/01-Variables.ipynb
index e41e0f9..2ea20de 100644
--- a/01-Variables.ipynb
+++ b/01-Variables.ipynb
@@ -244,7 +244,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "Integer"
+    "## Integer"
    ]
   },
   {
@@ -271,7 +271,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "Float"
+    "## Float"
    ]
   },
   {
@@ -318,7 +318,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "Variables"
+    "## Variables"
    ]
   },
   {