diff --git a/ATLAS-Open-Data-Python-13-TeV-framework-script-analysis.ipynb b/ATLAS-Open-Data-Python-13-TeV-framework-script-analysis.ipynb
index 4c289b735b56fe079bdd2053df403da6b1ba119b..5033124ab2d03b721ca679deba42cce096a44453 100644
--- a/ATLAS-Open-Data-Python-13-TeV-framework-script-analysis.ipynb
+++ b/ATLAS-Open-Data-Python-13-TeV-framework-script-analysis.ipynb
@@ -877,7 +877,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "## Reference\n",
+    "## References\n",
     "[OS module](https://docs.python.org/3/library/os.html) \n",
     "\n",
     "[datetime module](https://docs.python.org/3/library/datetime.html) \n",