diff --git a/src/HowBadIsMyBatch.ipynb b/src/HowBadIsMyBatch.ipynb
index b0324f8df2d..671b1deeff7 100644
--- a/src/HowBadIsMyBatch.ipynb
+++ b/src/HowBadIsMyBatch.ipynb
@@ -26,7 +26,7 @@
     "class VaersDescrReader:\n",
     "    \n",
     "    def __init__(self, dataDir):\n",
-    "        self.dataDir = dataDir        \n",
+    "        self.dataDir = dataDir\n",
     "\n",
     "    def readVaersDescrsForYears(self, years):\n",
     "        return [self.readVaersDescrForYear(year) for year in years]\n",