diff --git a/bluepyefe/extractor.py b/bluepyefe/extractor.py
index 1911fce..a0fc406 100644
--- a/bluepyefe/extractor.py
+++ b/bluepyefe/extractor.py
@@ -233,7 +233,7 @@ def newstd(self, a):
             return numpy.std(a)
 
     def create_dataset(self):
-        """Read the trace files and add them to the dictionnary self.dataset"""
+        """Read the trace files and add them to the dictionary self.dataset"""
         logger.info(" Filling dataset")
 
         for i_cell, cellname in enumerate(self.cells):
diff --git a/examples/example.ipynb b/examples/example.ipynb
index e1ef8eb..4c41f66 100644
--- a/examples/example.ipynb
+++ b/examples/example.ipynb
@@ -39,7 +39,7 @@
    "source": [
     "BluePyEfe is used to extract electrical features for groups of cells. This is done using the \"Extractor\" class.\n",
     "\n",
-    "The main requirement to use the extractor class is a configuration dictionnary which contains all the metadata for our trace files as well as options specifying how the extraction process will happen. For the current example on two cells, the structure of this dictionnary will be as follow:"
+    "The main requirement to use the extractor class is a configuration dictionary which contains all the metadata for our trace files as well as options specifying how the extraction process will happen. For the current example on two cells, the structure of this dictionary will be as follow:"
    ]
   },
   {
@@ -50,7 +50,7 @@
    "source": [
     "import glob\n",
     "\n",
-    "# Get the path of the files for the first cell and build the metadata dictionnaries\n",
+    "# Get the path of the files for the first cell and build the metadata dictionaries\n",
     "files_B6 = []\n",
     "for i in range(181, 186):\n",
     "    files_B6.append({\n",
@@ -75,7 +75,7 @@
     "                    \"ordinal\": str(i),\n",
     "                    })\n",
     "\n",
-    "# Build the config dictionnary\n",
+    "# Build the config dictionary\n",
     "config = {\"cells\": {\n",
     "                \"B6\": {\n",
     "                        \"etype\": \"etype\",\n",
@@ -157,14 +157,14 @@
   {
    "cell_type": "code",
    "execution_count": null,
-   "outputs": [],
-   "source": [],
    "metadata": {
     "collapsed": false,
     "pycharm": {
      "name": "#%%\n"
     }
-   }
+   },
+   "outputs": [],
+   "source": []
   },
   {
    "cell_type": "code",
@@ -195,13 +195,13 @@
   "pycharm": {
    "stem_cell": {
     "cell_type": "raw",
-    "source": [],
     "metadata": {
      "collapsed": false
-    }
+    },
+    "source": []
    }
   }
  },
  "nbformat": 4,
  "nbformat_minor": 2
-}
\ No newline at end of file
+}