diff --git a/climate.ipynb b/climate.ipynb
index 408c3cd..710f095 100644
--- a/climate.ipynb
+++ b/climate.ipynb
@@ -81,7 +81,7 @@
    "source": [
     "columns = ['year', 'month', 'decimal_date', 'average', 'smooth', 'std_days', 'uncertainty', 'empty']\n",
     "df = pd.read_csv(\"https://gml.noaa.gov/webdata/ccgg/trends/co2/co2_mm_mlo.txt\",\n",
-    "                  sep = '\\s+',\n",
+    "                  sep = r'\\s+',\n",
     "                  comment = '#',\n",
     "                  header = None,\n",
     "                  names = columns\n",