diff --git a/Notebook_Primer.ipynb b/Notebook_Primer.ipynb
index 9da4125..96ff93b 100644
--- a/Notebook_Primer.ipynb
+++ b/Notebook_Primer.ipynb
@@ -43,14 +43,14 @@
       },
       "cell_type": "code",
       "source": [
-        "print(\"Hello world\")"
+        "print(\"Hello world!\")"
       ],
       "execution_count": 7,
       "outputs": [
         {
           "output_type": "stream",
           "text": [
-            "Hello world\n"
+            "Hello world!\n"
           ],
           "name": "stdout"
         }