diff --git a/src/HowBadIsMyBatch.ipynb b/src/HowBadIsMyBatch.ipynb
index 9d474a48618..bd189a37c8d 100644
--- a/src/HowBadIsMyBatch.ipynb
+++ b/src/HowBadIsMyBatch.ipynb
@@ -310,7 +310,7 @@
     "                'Severe reports',\n",
     "                'Lethality'\n",
     "            ]]\n",
-    "        return batchCodeTable.sort_values(by='Severe reports', ascending=False)\n",
+    "        return batchCodeTable.sort_values(by = 'Severe reports', ascending = False)\n",
     "\n",
     "    def _getBatchCodeTableByCountry(self, country):\n",
     "        if country in self.countryBatchCodeTable.index:\n",