diff --git a/notebooks/V09_zustandsrekonstruktion_mittels_beobachter.ipynb b/notebooks/V09_zustandsrekonstruktion_mittels_beobachter.ipynb
index 6c85ec6df0129affe22945ee920a122647f4cad9..9f5f595cb81bd19a3b34dc76c77ad66d6e4cd4c9 100644
--- a/notebooks/V09_zustandsrekonstruktion_mittels_beobachter.ipynb
+++ b/notebooks/V09_zustandsrekonstruktion_mittels_beobachter.ipynb
@@ -44,7 +44,7 @@
     "\n",
     "C = [1 0];\n",
     "\n",
-    "D = 0;"
+    "D = 0"
    ]
   },
   {
@@ -893,31 +893,24 @@
    ]
   }
  ],
+
  "metadata": {
   "kernelspec": {
-   "display_name": "Octave",
-   "language": "octave",
-   "name": "octave"
+   "display_name": "Python 3",
+   "language": "python",
+   "name": "python3"
   },
   "language_info": {
-   "file_extension": ".m",
-   "help_links": [
-    {
-     "text": "GNU Octave",
-     "url": "https://www.gnu.org/software/octave/support.html"
-    },
-    {
-     "text": "Octave Kernel",
-     "url": "https://github.com/Calysto/octave_kernel"
-    },
-    {
-     "text": "MetaKernel Magics",
-     "url": "https://metakernel.readthedocs.io/en/latest/source/README.html"
-    }
-   ],
-   "mimetype": "text/x-octave",
-   "name": "octave",
-   "version": "4.2.2"
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.7.3"
   }
  },
  "nbformat": 4,